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- เผยแพร่เมื่อ 13 ก.พ. 2012
- How to easily test and repair an older switchblade style Mercedes w202 and similar key/remote and batteries. you may need to reset the key to be recognized by your car once this is finished...simply point the remote at the door unlock sensor and push the button twice,,then insert the key in the ignition and turn to the first position...the key should now be re-set to be recognized by your car follow me on twitter / fupabox
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I just wanted to thank you for all of your video repairs on the W202 model. You have saved me many times, not including thousands of dollars.
Excellent..that's what it's all about.. glad they helped :)
Thank you for posting this video! My issues was that the fob had come apart. The spring and button had come out and I had no clue as to how to put it back together so I had a floppy key for a couple days. THANK YOU!!!
Thanks a lot for this video! My key fell on and pieces went everywhere, now it's back together and it's more solid than before. Thanks for teaching this!
Worked for me!! I just simply did what you said in your description when I replaced the battery. Point twice at sensor... Open switch. And voila... It's working. Thanks a million!!!
OMG!!!! I am soooo glad I read further down in your replies. This morning I came out and found my dors would not lock/unlock on my 1997 C230. I read the manual previously when I received the car for Christmas and TOTALLY forgot about "Valet Mode." I don't know how but after trying everything, then reading about valet mode in your replies....lo and behold that's what it was!!!! Thank you so much. Your videos are awesome!!! Here's a big hug and kiss on the cheek
lol... glad it helped
Thanx for the GREAT VIDEO! Did this on saturday night at 11:56, made my old key look brand new, it was all bent out of shape.
Just saw your video. Your information was right on! We were able to get the remotes to work on a used Mercedes we just bought. Your information on resetting the key was also most helpful. Thank you so much!
very welcome
Great video. Easy to understand the problem and the solution. THANK YOU!
I've got to repair the remote locking on my boss' 93/94 Merc SL and this info will surely help. Good vid man.
AMAZING! i honestly didnt expect this to work but it did. THANK YOU SO MUCH. Im such a rookie at this kinda stuff and you just saved me 200+ dollars. AWESOME vid man. :)
Thank you so much for this knowledge 🙏🏾, a multitude of chaotic events were about to unravel if I hadn’t seen this video.
I really appreciate all your R129 videos, this one most recently. I took my 96' SL500 in for a mixed bag of service last week. Among other things, a non-working remote. I replaced the batteries and got the led to flash but no IR. The dealer said I had a bad remote and it couldn't be replaced. I watched this video and pulled the remote apart. I reflowed the solder joints on the microswitch and BOOM, working again. Now I have to tackle fixing the motorized antenna, replacing the e-break lever. replacing the windshield washer pump, and rebuilding or send off the convertible top cylinders...We'll get there.
Well, this one is not technically an R129 video but the same remote :)
You will get it done...and you'll love the car
bro u saved my life i love u
that camera/battery test was REALLY useful too!
I did not see anything more through the camera than I saw with the naked eye...just the infrared light-no pulsing white lights.
Great help for 96er 200C station! Thank you from MercTown :-)
Hi,
I will try it an I'll give you an update!,
Thank You very much for you answer I really appreciate it,
we do need more people like you sr.
Thanks for the tip on reseting the key!
Thanx man it was really helpful and the problem was with the botton but i fixed it and it works now
Great video, never knew you could do that thing with the infared light and the camera.
You Sir are a life saver and no you are not brain dead. Thank You for the video.
Thank you very much for this. I have a 1994 Mercedes 280E and on the weekend. (My model has the flashing lights oln the drivers door handle) I dropped my remote and the battery compartment opened. I put the batteries back in but the remote wouldn't work. The cost of a replacement from Germany is prohibitive and I eventually came upon this thread. I checked the remote with the camera and the red light and flashing light was working. I then followed you instructions and the key reset first time. Thanks again
glad it helped :)
Hey bro thank you very much you helped me so much thank you God bless you
@fupabox That's what I was afraid of. Thanks for the reply you rock.
Great video!
Thanks for to tip. It was my problem. Working now!
Thanks for your reply! Finally got it apart, soldering as we speak, hope this does the trick as both my keys don't work
thanks dude.helped me
i'll try it at home,,
big thanx bro,, :)
that was really helpful video, thanks!!!
glad it helped
Thanks. I'll see how it goes now that the key is working. So far so good. It didn't cut out yet.
Thank you very much!
good video!
i just fix my 2 key in 10 minutes!
I've got the same key for my W124 '95. I was away from home visiting a friend, and my key was dead when I wanted to go home..I knew about the red light that shows if the battery is working or not, and it was not present, naturally. Changed the batteries to some new ones, but still no red light. Found this video and got the idea to open the key to look for some broken connections, and discovered that the main button on the card had come loose, all the 4 legs. Got someone to come over with a soldering iron and I got the thing connected again. Bingo! Could get my dear Benz started and get back home;) Thanks for posting the video:)
excellent ..glad it helped
Thanks bro! Second thing I fixed for free.
great tip buddy!!
Thank you for sharing!
Hello mate could you please do one video for the newer type key as well?
You know the full plastic with the hidden switch blade so called NEC key?
Fupabox, what if the red casing that covers the infared bulb is missing? There is no red l.e.d. or infared beam emitting from the fob also
Hi and thanx a lot for a very useful video. I have one question, where is the signal receiver located, is it exactly in the mirror where there are green/red light flashing?
Hi,
Thank you very much for the comment.
What will happen if ovp or fuel pump delay fault?
Can it be the genuine fob fault?
Thanks a lot.
This is a great video.
Now I only need to see how to synchronise a new transmitter to the car!
sitting in the drivers seat point the remote at the rear view mirror and push the unlock button on the remote..when the light on the mirror flashes green insert the key in the ignition and start within 10 seconds
***** Thanks, shall try!
Hi,
Thank you for the video it's really awesome, about a video with the faulty key with the light on you have do you know something about it or any video link that explain how to fix it? mine keep the UV light on just like that one
My key keep draining batteries I think. I can put new batteries in and it reprogram it to the car, it will work for a day and then when I click the button the car no longer responds. What could cause that?
Great vid bro.. Would you continue with resync/reset key vid? Mine still not worked it out.. Thanks
man is different class
thanx again bro
hey your video is so helpfull so , i took my key to repair and the IR light is working but not opening the car :( what should i do ?
Hi,
My fob is similar to the one you show in the video clip. with one button only, hence, i assume your comment to press the lock/unlock button on the remote once is to press the fob button twice.
thanks for this video, learn alot, too bad my case is other, my remote is with slide fisical key and is the plastic that sticks on the ignition hole.
can you tell me from where can I buy whole new set remote and chip and how can I set program on new set thanks
My key when battery changed keep the infra red light always on, do you know by where can I check for a circuit closure?
1997 C230 base 4 cyl for the climate control system readouts. Havent done it so dont know which ones just want to be prepared. Ty
I was wondering how you got rid of the glue that holds the key together. I'm scared of breaking my Key while opening it. All tips are very welcome
Hi.
I have simular key on my 95` W124 E220.
I have the same problem with the key remote buttom not working.
Is it the same reset sequense on this?
Daniel, Norway.
My problem was same as previous comment by marty. I'd bought a replacement case without instructions and didn't know you had to twist and spring load the king. Also a quick mention the chip in mine was loose and fell out without realising . I spent two days figuring it out and was lucky to find it again. So be careful with the chip or it won't start the car !?👍
yes , you are dead right .. the chip can be loose and go missing
I need to buy a new one, do you know where I can find it? And sorry I commented in on of the other videos about it, i didn't know you had a video about it
Is there a fix for the driver's heated seat that no longer turns on?
Thank you.
Hi,
If I point first to door handle and press, no respond from the car, the door still lock.
Is there any sensor at the door handle? Possible mine is faulty because can't unlock the door by pointing fob to the handle and press once.
Hi,
What can I observe when I press the button once. Because I don't observe anything when press once as instructed.
My sequence is unlock the door by point fob to rear mirror, then point the fob to driver door handle and press once then open door and start the car within mentioned time. The car starter just turn but still don't wanna run.
Hi,
Remote battery changed, got it from my Mercedes agent.
Still can't. Might change my car battery later because tries too many times it sound low power now. The green and red led at rearview mirror flashing with 2 patterns, both led flashing at the same time and both led flashing alternatively. Mine is both led flashing alternatively.
Thanks again for your fast reply.
I need help asap my cars locked and it won't let me start it because the anti theft system but I bought new battery's the car unlocks and locks but it still says its getting robed
Is it possible to put a new key blade onto a replacement fob?
If i send you my key could you repair it? How much would you charge. I need a new lock button because its missing, and the contact point for the battery thats it
Hi,
How long do I need to disconnect the car battery for it to reset?
Just wonderful presentation of the kind & wind assembly of the switchblade, did my R129 so many times , I lost the positive battery connection , maybe you can verify, I was told not long ago that Mercedes dealers are no longer offering the key replacement for Too much money,,, thanks
The dealer may be still able to get them . Not 100% sure . I haven't called them for one in quite a few years . If you can find a used one you just need to swap in your pill sized transponder chip that sits in your key case by the metal key blade . Thats the thing that pairs the key with your ignition . The rest of the guts can be used and the new/used key case can be paired to your car .
Hi,
I got a w202 c280. the red and green light flashing alternatively when i try to start the car. The starter will turn but not run. i had change the fob key battery. I try to reset the remote with sit in car, press the remote (pointing to the rear mirror) lock then unlock and try to start the car within 15 second. With not luck, the red and green light still flashing alternatively. I can use the remote to lock and unlock the door.
Your help is very much needed. Many thank in advance.
Hi,
By using the phone camera trick, I can see the ultraviolet light and infrared flash once if I press and hold the button more than 5 second.
Hi,
I tried pointing the remote to the driver door handle with green and red led but not respond from the car, i means the door will not lock and unlock. i need to point it to the rear mirror receiver to lock and unlock the door.
I try again to start the car and the starter will turn but still not run. After a few tries the red and green led at rear mirror flashing alternatively again.
Worked for me. Thanks so much. What wattage of soldering iron do you recommend for car circuit board work?
glad it worked..good question.. I use a variable temp.soldering iron.. adjustable to 60 watts..I'll ask my electronics genius friend if there is a wattage that is most suitable for car electronics
How do you program the remote? Please help!
What is the exact recommended code of the batteries?
great vid, managed to get my glued key apart after cutting two of my fingers (ouch) but still only getting the red led light flash once, put the uv lamp through a camera but still doesn't light, any ideas what it might be : }=
Hey again fupabox. What type of batteries are inside this casing? cr2025?
+Braut The Gaut on the switchblade key it should be a 2025 from the factory.. a 2032 will fit but is a bit larger and will widen the contacts.. if someone put 2032's in previously, you can put 2032s back in .. just don't mix the 2
What do I do next if this doesn't work?Awesome video. Thanks.
if you have checked all the soldered connections and the buttons ,and there is still no visible light (assuming the batteries are good) the key may need to be replaced
Love your video's, was able to do a lot of work on my car that I was othewise afraid to including upper ball joint which I can't believe was relatively so simple for such a cool car. One question, I have an imobilizer chip in my remote and can't for the life of me figure out where this sits in the case, any thougths? Thanks!
it should be a little silver flat piece glued to the inside of the case near the red IR lens..it isn't attached to the circuit board
***** ah, it is glued to the inside, mine may have "let go" as I found out the scary way that I had an imobilizer as the car wouldn't start once I replaced the FOB. Luckily I found the tiny transponder in the foot well! You make everything look so simple and are fearless.....I live vicariously through you sir! Thanks and warm regards to you and your family this Holiday season.
I always had problem with the case it never worked right for me I always end up putting a screw to hold it together
Hi,
Not yet.
Will try and post with the result
Thank you for this post! I have a 2007 Mercedes ML-63. My fob will not lock the car and now it is starting to not start the car. I replaced the battery and it is still doing this. What do you recommend?
Brooke Little I don't have lot of experience with that key..the ones I have had have never had any issues.. I did find a forum post that may help you..mbworld.org/forums/e-class-w210/413842-ignition-switch-sometimes-doesn-t-recognizes-remote-key.html
hi which of websites one can learn how to repair
Hi Fupabox, long time subscriber. I know this is an old video but, do you know how the mercedes keys with no red see through port operate? I have a 2000 ML55 and the key will start and unlock the car manually but will not unlock and lock with the remote. I have changed the batteries, cleaned the contact points and aligned everything correctly. Any thoughts on what it could be? Much appreciated!
There is an antenna attached to the AAM module under the hood . It attaches to the fuse panel . Check that the antenna is screwed in all the way . Looks like a cable coax connector . I think it’s shown in my AAM replacement video .
fupabox thank you! I’ll give that a shot and update.
Beware of some of the aftermarket key fob shells for the W202. The internal circuit board out of mine would not fit one type even though they looked identical on the outside. The inside cut patterns differ slightly. If you have a CE on the back of your fob do not get one that does not have the CE. My circuit board (1997 C230) would not fit an Ebay shell. Had to try a few types.
good info..I must have lucked out since mine fit fine..It came from a seller in France
Hi, fupa. I've watched your videos for a while, since it refers to w210 chassis as well. Mostly.
I've had problems with my w210 (1996) switch key from the day one. It opens and closes the doors whenever it feels like it. Batteries are brand new and the right size to be exact.
I did the battery test with my camera and the light is doing the exact same thing as yours. It should flash repeadetly, right?
Mine doesn't turn on the light at all or it stays on and won't shut off no matter what I do... Pretty weird..
Do you think the solders on the button itself are bad?
+etu keno That is the most likely problem... I would try re-soldering them
I'll have my friend with more electornics experience do that to be sure.
I'll let you know if it worked.
Thanks!
+etu keno I did some further testing and it turns out the casing of they key doesn't seal the connection to batteries.
I cut out a small piece of smoking filter and placed it between the battery connector "leg" and casing.
Works flawless now.
Just my two cents for people experiencing same sort of issue. Mine was as cheap and simple as that.
etu keno good info.. excellent :)
i lost my key spring,, wondering what should i do now,, it wont flip like it use to be now,, :'(
Thanks. That's what I just got. Do you know how the credit card immobiliser remote should work. How do you disarm it when starting the car? Should it recognise the key and just do it automatically? Seems to auto set when you remove the igniton key ok.D
I'm not sure how those work. I guess they use the credit card to allow power to go to the ignition key..no credit card, no start..they've been around forever but I've never used one
Hi I'm after a spare key for my van its the same as in your video. Can I reuse reprogamme a second one of ebay with a new key blade cut to suit.
I'm not too sure on how the programming works, if you can use one that is already mated to another car...I'm sure someone can do it
Where can I get the trouble code readout list?
Tried it. I think the led is bad. Gets a voltage reading at the led connection but no infra flashes. Not to mention mine had a couple other parts. Looks like a little magnetic square with a white plastic holder that goes in before the circuit board. Assuming that is another added security feature that reads at the ignition to the key to actually start the vehicle. Make sure you watch how the peices fall out. My switchblade key is for a 99 mercedes sl500...
Do you know a way to program my my remote key to my car. I have a.1997 Mercedes Benz E320. I have two remote keys(they're the same as the one you're using in the the video) for them and none of them work, the light only blinks then nothing happens.
Gimberg Preval point the key remote at the rear (inside) view mirror..press unlock on the remote..then start the car within 5 seconds
Hi, helpful video but I can't see the transponder in that key. is there one?
it isn't the same as the little black chip in the newer versions..it is built into the board
This key has transponder ? Can i use a different key without the remote after a sync ? thanks.
the key has an electronic chip in it, so it won't work without a chipped key
THNX MAN U ARE GR8
I chech out my remote and found that the IR LED legs were broken, fixed it THNX 2 U
Hi,
Just try out the new battery with disconnect more than 10 minute. Pointing to the rear mirror. Press lock and unlock once. The car manage to start and run but it stop after around 1 minute. Then the red and green led flashing alternatively again. :(.
Then try the lock unlock sequence again and try to start again. The starter turn but engine still don't wanna run. After a few try the red and green led flashing alternatively again.
Apakah kunci kontak Mercedes c230-w202 pakai chip?
my key aren't responding anyway.. i've heard that it is a kind of a sensor in the inner rear view mirror? Do you think it could've break by my subwoofer? it makes the mirror shake.. I have also heard that you can reencode your key by yourself, but it's not responding to my freakin mirror and the doorlock's (or the door) changed.. what should i do?! I got an W202 -97. i would appricheate your help! Sorry if something is misspelled.
It is possible the subwoofer could rattle the sensor loose...the trunk will work to unlock the doors also if the the key won't work on the door.
fupabox hah, yeah.. i've already broke a key that way.. love life right now xD i will go an talk to the workshop tomorrow and then we'll see what happens.. Nervous as hell right now *LOL*
Hi, its a bit off topic but i wanted to ask you about the IR diode transmitter. Mine broke off and i need to get a replacement. Is there a specific one i should get?
Not sure ..If you took it to an electronics part store they may know which it would be
@@fupabox thank you.
If by a chance you see this comment, did you ever figure out what causes the IR to fail in the always on like the first key you show?
OK, thanks.
I have the same problem of not being able to use the original blade in the aftermarket case I purchased so will need to get the blank cut. All the places I have asked to do this price it in excess of $50 to have the blade cut because they say its laser cut. What kind of place did you take it to where it was only $15? thanks
it was a little corner store with a poster in the window saying they could cut Mercedes keys...I couldn't believe they could do it, but they did
***** haha well I will keep looking then. Thank you for the videos your channel has been a huge help to me.
Would you know were I could get the spring for the key fob ?
the ebay shell replacement kits have a spring included in them..
hi fupa,i have a problem my key flash only purple when i look from camera and no any red light got key same and your ones.what i need to do? cheers!
+Ines Knežević The red light is a battery test. So the battery is possibly bad