Hola saludos tengo un Mercedes modelo e320 año 2002 tengo una pregunta ❓ la batería debe recibir suministro de carga del alternador la batería auxiliar? Es decir con el vehículo encendido la batería debe recibí 14.20 v ?
When you tested the original Mercedes battery it was rated at 170 A(EN), you should have scrolled down at the Battery Standard screen and selected EN, not selected CCA.There are vast differences in these readings especially with smaller batteries like these. Again the 200 A rating for the Super Start Platinum is an EN rating, so the correct setting on the tester should be first selected. My calculation from your CCA to the correct EN value would put your new battery around 221, closer to the specified 200, but no-way would it be 375.
Thanks alot for this great informations. Just want to ask you before changing it did you notice that SBC system not starting with door open as usual but starting with engine start ?
I don't think the aux battery has any CCA (cold crank amps) to be able to start the engine, further, I'm sure it will be on a different circuit to the main starter battery. My keys have a master that is removeable from the key fob by a slide. This skeleton key will fit the boot for access to the main battery. You will find the keyhole centrally upside down, so that it is not visible. Very good video re aux batt relay. Thank you.
@@ChrisAsipyan My 2007 E550 had alarm going off. Decided to change out aux battery and if that didn't fix it, would disconnect alarm like you did. I find out my car doesn't have an aux battery where seemingly all W211s had them. Regarding the alarm, I look at SmartKey and it was going bad. Not just batteries because I replaced them but the SmartKey went bad. Used other SmartKey and the alarm doesn't go off anymore. And very 1st step had the primary battery tested and it was good. So, check SmartKey for mysterious alarms.
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Hola saludos tengo un Mercedes modelo e320 año 2002 tengo una pregunta ❓ la batería debe recibir suministro de carga del alternador la batería auxiliar? Es decir con el vehículo encendido la batería debe recibí 14.20 v ?
Yes... With engine running, battery should be receiving between 13.7 to 14.7 volts.
Very helpful video. It benefits me for my 2008 E320 Mercedes Benz wagon that is giving me starting problem. Thanks a lot
Great to hear!
Thanks. This helped me solve some strange issues I was having similar to your car alarm siren.
Nice! Glad the video helped.
One of the best videos on this topic. Thank you!
You're welcome!
When you tested the original Mercedes battery it was rated at 170 A(EN), you should have scrolled down at the Battery Standard screen and selected EN, not selected CCA.There are vast differences in these readings especially with smaller batteries like these. Again the 200 A rating for the Super Start Platinum is an EN rating, so the correct setting on the tester should be first selected. My calculation from your CCA to the correct EN value would put your new battery around 221, closer to the specified 200, but no-way would it be 375.
Thanks for pointing this out!
Thanks alot for this great informations. Just want to ask you before changing it did you notice that SBC system not starting with door open as usual but starting with engine start ?
Unfortunately, I did not pay attention to that. Don't know
Great video. Thanks. Can you perform the test from the battery studs in the engine bay, as the battery is under the passenger seat? Thanks
Probably... I just don't know what else might be between the studs and the battery terminals.. it might cause the test to not be accurate
Do you have to disconnect the large battery prior to remove the auxiliary battery?
Yup, you should
Show car firing up would be nice!!!
True :/ ... I should have included that part
my e500 2003, both batteries are dead, i cannot open trunk with key or button, if i replace my aux battery then would my car be able to start?
I don't think the aux battery has any CCA (cold crank amps) to be able to start the engine, further, I'm sure it will be on a different circuit to the main starter battery. My keys have a master that is removeable from the key fob by a slide. This skeleton key will fit the boot for access to the main battery. You will find the keyhole centrally upside down, so that it is not visible. Very good video re aux batt relay. Thank you.
Can always open trunk with metal key in fob.put metal key in trunk lock turn and grab see switch below star trunk opens
No.
Thanks to the TH-cam community for all the helpful answers!
Thank you. Good video !.
BTW, did it fix your alarm issue?
Unfortunately, after a while the issue continued.
@@ChrisAsipyan how did you fix the alarm issue?
@@raytgalv6438 I didn't ... I simply just disconnected the alarm since I did not care for that feature anyway
@@ChrisAsipyan My 2007 E550 had alarm going off. Decided to change out aux battery and if that didn't fix it, would disconnect alarm like you did. I find out my car doesn't have an aux battery where seemingly all W211s had them. Regarding the alarm, I look at SmartKey and it was going bad. Not just batteries because I replaced them but the SmartKey went bad. Used other SmartKey and the alarm doesn't go off anymore. And very 1st step had the primary battery tested and it was good. So, check SmartKey for mysterious alarms.