Replace Spark Plugs of Mercedes M278 W221 S550 奔驰更换火花塞
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- เผยแพร่เมื่อ 7 ก.พ. 2025
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Welcome to leighsr.com to discuss.
Every 6 years or 60,000 miles we have to replace the spark plugs of our Mercedes, that's requiring of Mercedes maintenance booklet.
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What a beautiful DIY video without a single word being spoken and no annoying music. Thank you good sir.
For a DIY buff who enjoys working on cars/engines, I’ll first thank for this video which was my best reference to replace the plugs on my 2016 E550 with its twin turbo V8. For anyone else thinking of doing it: it’s a ++ challenge w/o the proper tools. You have to have the correct size magnetic spark plug pivoting socket plus the long handled coil pliers. Even then there’s very little room to access the coils/plugs closest to the engine firewall, making those 2 on either side the most difficult to work on. I used “clunky thick round head” ratchets (alternating between 1/4 and 3/8 drives) and would have done better with the thinner ratchet heads shown in the video. But using the recommended pliers, I still tore apart the tubing on both ignition coils located closest to the firewall, since it was so awkward to leverage the pliers to pull the ignition coils out, with so little room. I’ll see if I can replace only that tubing but if not, I’ll buy 2 new ignition coils. So definitely not an easy DIY job and something to keep in mind, especially if you’ll suffer w/o a workable vehicle while waiting to get (for example) replacement ignition coils.
Just back from my Mercedes dealer. They sell the "boot" that connect to the spark plug, so I didn't have to buy the entire ignition coil. As well, I'm told their techs have an off-set torx E8 socket which allows them to reach the bolt head connecting the ignition coil nearest the firewall, which makes it ++ easier to access that bolt head. Always pays to have the right tools. Finally, I'm told I should have warmed up the engine (just enough so it wasn't too hot to work on) and doing that would have made it less likely that I would have torn the ignition coil boot when trying to detach it from the spark plug. I thought a cold engine was the way to go (to avoid expanded parts) but that's the exact opposite of what I needed. A few additional points for anyone doing this job. Good luck!
Truly exceptional, and honestly - The best DIY I have ever seen.
I just kept waiting to see you get another tool from the tool drawer. Now that’s impressive.
What a great video! For once, no obnoxious music, just slow and methodical.
Great DIY! Just did the spark plugs on my 2012 E550 and used this as a reference. I pulled the ignition coils while the motor was hot/warm, then waited for the motor to cool to torque the new plugs. I didn't break any coils and they came off with ease. On my tuned car with 60k miles it definetely needed a change. Thank you for the detailed video!
You used oem Bosch with stock gap?
Yup stock plugs with stock gap from FCP euro. No problems so far. The E63 uses the same plugs so I didn’t think it was necessary to get colder plugs or mess with the gap.
@@HaradaR716 yeah I’m also running stock plugs stock gap on tune. Was thinking about trying NGK colder. I have a feeling that all these m157/m278 cars grenading has something to do with incorrect spark plugs, so I’ll just stick with stock
@@Phuong_Nguyen_ bosch plugs come 100% with correct gap this is not 1980 i always check my gaps nd havent had to change any in 20 years
@@holeshot1721 you’re not understanding what I’m talking about. Plugs come pre gapped but many people and tuners close the gap a little when they turn up the boost to prevent misfire.
Mr Lee did very good & precise videos, I m a MB tech, I have to say your job details like professional mechanic very impressive silicone grease back all plugs/connectors very important
So how important is it to Index the Plugs as MB Calls for?
I also want to know. I thought you have to clock the spark plug in a certain orientation for proper ignition or it would cause pre ignition
@andrewlee381 Are you an A, B or C tech? I also was a MB tech, but have been gone from the dealership life about 15 years now so I’m not up to par with all the new products and procedures. Could you please enlighten us on proper alignment for the spark plugs? I see he was using WIS
This Channel is underrated! Love your S class stuff!
Fantastic video. I have a tendency to pull apart the ignition coil so I let the spark plugs go 70-80K instead of 50K and then replace the ignition coils at the same time.
You have the coolest tool! You have to be a Mercedes Benz mechanic for sure. Love your videos
Sure, I’m going to ask a job at MB😂
Thanks for the video. I used it for my GLS 550. I will say the GLS 550 was more difficult, but the concepts were the same. Getting in the very back is a challenge but doable.
Thanks, and yes even if the same engine but the GLS has no enough engine hood opening than S. That’d be some more difficult to operation.
@LeighSr I heard people saying you have to orientate the spark plug into a certain position in relation to the injector to get proper ignition or it could cause improper combustion causing ring failure
Great video. I was nervous about attempting this maintenance, but it doesn't look too bad.
Thanks. Approximately 1.5 hours to 2 hours without recording videos.
Senior Leigh, Thank you for such good and relaxing videos. I enjoy them and take time to relax and learn! Please keep up the great videos!
相當細心的做工，給個小建議，火星塞及螺桿轉至接觸面時再使用磅錶上磅，磅錶延壽
Thank you so much for the video. I'm about to start on my "new to me" e550. This answered a lot if questions.
And that is how you save $600 dollars compared to the dealership doing it. This is also the time to replace the coil packs as it's good preventative maintenance on these engines to prevent misfires.
老李师傅，活干得真心漂亮，工具也亮，视频拍得也到位，相当棒的示范教程。如果在一些节点上加上相关文字就更完美了。哈哈
谢谢夸奖❤️
文字部分正在逐步编辑至：leighsr.com
Excellent video, many thanks. Question - does the WIS instruct regarding spark plug indexing, the final orientation of the plug electrode in the head? I'm puzzled in that the threads start where the threads start, and the torque spec finishes the job. Any comments? Many thanks once again!
Great tutorial!! What size torx socket for the bolts securing the coils?
Amazing video! Thank you
Great video from main land 👍🏻
This is an excellent video.
先感谢做视频的老李之后在认真慢慢看
这回有点长，当肥皂剧看吧😄😂
great video thank you, what grease did you use for the plug to the coil and why?, also no antieezed grease for the plug?
Thanks, and that's Dielectric Grease, to protect the insulation and easy to pull off while next time of replacing. For a new spark plug replacement, there is not necessary to apply the anti-seize grease.
You should not use di-electric grease on electrical contacts because it inhibits current flow, just the opposite of what most people think.
Great video many thanks 👍👍👍
Are you indexing the plugs? And making sure they are indeed indexed?
Nice, very detailed, but I have to ask. What information would we get from scoping the spark plug sockets? I'm sure there is some solid information there, but I wouldn't know it if I saw it.
You might visit the official website of the spark plug, find the page of spark plug’s model number, you can find out the socket information on the webpage.
Awesome video, I just ordered everything I need for this. I have question, I see grime build up on my front timing chain covers (left and right) I was told I just need to reseal them soon before they start to leak. Have you done this procedure?
Thanks, hope you have a smoothly process with replace the spark plugs. For the tiny leaky of the timing chain covers, I don’t think that’s necessary to reseal it because that’s a bit high risk task for applying the liquid sealer on the surface of the parts. That tiny leak won’t lead to big leaks. The resealing might mess up the seals if you are not a experienced technician. But if you need a guide to do that, I can publish the WIS of the procedure on www.leighsr.com/forum.
@@LeighSr Thank you for getting back to me and being very informative. I was afraid it would lead to bigger leaks, so far it only looks like dirt grime build up. The vehicle has 60k miles on it. Yes please, the guide would be nice to have.
Senior Leigh, thanks for a great video. Always enjoy your videos. At what mileage do you change the ignition coils? or do you just change the coils every time you change the spark plugs? Thank you
Fantastic video, thanks Mr. Leigh for the very clear assistance here. My wife has a 2015 GL550 and this video enabled me to address an ignition coil failure. Have you thought about putting a video on changing the engine coolant? It's not clear to me how to change the coolant in the small tank below the engine cover, which I believe is connected to the turbos. Is this coolant separate from the radiator's coolant?
Thank you!
And yes, the coolant replacement is on my schedule, but maybe later. The coolant is not separate from the engine and turbocharger intercooler. That's a complete system.
@@LeighSr Thank you again Senior Leigh for your timely reply. This gives me greater confidence!
@@peterohara3265 you are welcome.
Just bear in mind, after coolant refilled you have to bleeding the cooling system. At the end of the webpage, you might see the methods of bleeding the cooling system, www.leighsr.com/coolant-pump-replace-m276
👍，这是教科书级别的
Great video quality 💯☕️
thanks
What socket was used to unscrew the bolts holding in the Coils?
Hi Sir, Do you have any video for throttle body cleaning for that S550? thank you in advance
Wish I found this video before I did mine. Now the stupid, I managed to break the tab on all the coil connectors. Instead of tapping the tap all way out, we forced its way out after loosening it. Do you know if those taps/clips are replaceable by any chance? Where can get them if there is such miracle.
Hi, sorry for the late reply. I think you might the clips of the receptacle housing which connect to the ignition coil. The receptacle housing can be replaced. The part number is 0275455026, the new replacement part number is 000-545-89-12. I found that available on amzn.to/3cbDpfJ
More detail we can discuss on www.leighsr.com/forum/garage
@@LeighSr Thank you so much for the info. It helps!
Those plugs r good for 100k. That time put new plugs and new coils. Good for another 100k.
Beautifully done?
I replaced all 6 coil packs and all 6 spark plugs now im getting code p0351 primary/secondary circuit i am getting a fault on all 6 cylinders? Any ideas im gonna try new sparkplugs as i watched a few videos and some guys say it could be the sparkplugs itself, nd the gap, im gonna get oem plugs
Did you get this resolved? if so, what did you do....thanks in advance
Prof guy !
Are you sure about the cylinder numbers? I thought number four was in the back on the passenger side on the M278.
You are right. See www.leighsr.com/forum/garage/the-firing-order-of-engines-l4-v6-v8
what the torque for the spark plugs? whats the torque for the coil connector screws?
23Nm. 9Nm
@@LeighSr psi??
The spark plugs are supposed to go in with no anti-seize?
No necessary applying the anti-seize paste on the new spark plugs, because there is a coating on the thread of the new spark plug.
I miss your excellent videos. I hope all is well.
I'll be back soon❤
@@LeighSr Wonderful ! You made my day. Thank you.
is that the cylinder order you posted on the video? i need to know where cylinder #2 is and i cant fing anything online. can you please help me. Thank you
Standing in front of the car, facing the engine, the closest cylinder at the left bank is cylinder #1. The 2nd is cylinder #2.
@@LeighSr Thank you!! I really appreciate it
Very informative videos have a question about the ignition coil connector plug that has the gray clip is there a place to get them I broke one on my car and would like to replace it thank you!
I’m still looking for that, not easy to find. I’ll let you know when I find it.
Whats the torque value for the coil pack screws?
9Nm
@@LeighSr Thank you.
Thank you for the good work. my ignition coils on my m278 engine are so tight i can't get them off is there another trick?
Maybe you can try to fill with WD40 into the sockets and waiting for a couple hours.
@@LeighSr okay thank you i Try this.
@@JavierRodriguez-cx6rs did it work?
love your channel. I have been trying to remove the electric connectors and have been unable to do so. been trying for 2 days now. ANY suggestions or help would be much appreciated.
Thanks, and you might try the WD40, that’s insulated.
又一部好video.李師傅～影片17:43用的是什麼類似保護膏？amzn能買到嗎？謝謝您
谢谢！
那个是绝缘硅脂: amzn.to/2MBu9UZ 材料和主要工具我都列在了视频下方，点击“More”或者“展开”就可以看到。
@@LeighSr 感覺不好意思了，新手對材料工具還沒熟悉，打攪了。非常感謝李師傅百忙中的回覆。我也很希望備一套好工具，像您一樣工作非常整潔，有步驟完成，工具歸位。讚啦👍
@@jayzhao4990 您客气了！相聚既是缘分❤️ 欢迎您到我建的网站论坛聊天 leighsr.com/forum
你好，你视频超赞，我买二手08年s550跑8万公里，现在有问题就是跑高速80公里以上方向盘抖坐椅抖，是什么原因
谢谢夸奖❤️
您的车多久之前做的轮胎动平衡？
@@LeighSr 没有做过，我打算下次换轮胎车行应该会做吧
@@黄礼泽 80km/h抖动是典型的动平衡问题。
@@LeighSr 谢谢🙏，我去做一个动平衡
What’s that tool called you use to remove coil pack safely
amzn.to/3F3VglZ
@@LeighSr Thank you, just ordered mine. Tackling this in a couple of weeks.
👍👍👍👍👍
👍🏻
Could you pls by any chance reply with the torque specs ?? Other then that very detailed video love it! My gl450 is about to get my hands on it!
Sure, there are two torque specs, the spark plug 23Nm, the ignition coil 9 Nm.
@@LeighSr thanks so much man keep doin what you doin🙏🏻👌🏼
恭喜您呀， 李叔叔您好 我是Vic，很喜欢您的视频，有些关于车子的事情想请教。我是cls63 amg 2013的车主，我们的车使用非常接近的发动机，m157是您s class的m278的amg版本。最近我的车子起步，刹车快停住，reverse倒档的时候都会很Jerky，感觉动力一下一下的，抖个两三下，一耸一耸的，像是missfire一样，转速表和排气声浪也会随之波动，有时候上坡高档位也会连续非常轻微的抖动，电脑没有codes，no engine light。目前我已经换了spark plugs, oxygen sensor, 清洗了MAP sensors，reset了TCM，在换oxygen sensor前有Missfire和sensor的codes，换plugs后这种抖动减轻但依然存在，现今不知道怎么办，想问问李叔叔有没有什么头绪。另外我们m157 or m278 在2013或更早的批次有timing系统的设计缺陷，我也检查了我的timing chain，幸好是换了新的版本，建议叔叔也去看一下，机油倒入口就能看到。网上有部分m157 m278车主都有我这个抖动问，下面贴上别人拍下来的问题表现视频。望回复
www.leighsr.com/forum/main/comment/619dd4ebab35f0001723b2a5
你好，这个问题已经在mb论坛里讨论过了，导致了一堆m276 m278 m157拉缸。原因是这些发动机油泵有两种模式（低压模式和常压模式）低压模式的时候一个solenoid开启，说是改善mpg。问题是这个solenoid会卡住，然后会导致各种你描述的问题最后导致全面拉缸。
解决的方式很简单，拔掉那个solenoid的插头，如果还不能解决，那就是你的solenoid卡住了，需要拿出来清洁之后再放回去
Hi where can I get this workshop manual? Thanks
That's manual was come with the MB Star. So if you wanna the WIS, you have to buy the Mercedes diagnosis system ebay.us/kspBSR
cylinder order is wrong
I could do without all the cinematography and ASMR crap and just get the job done.
I’m so glad I don’t have time for this crap….I just fix cars.
If you just fix cars why are you here complaining?
@@mauisuzuki7857 for real, he must not have much work since he is on hear learning how to do things the right way.
👍