Low voltage
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Mercedes c-class 220d w204 year 2012
Low voltage
I have a Mercedes c-class c220d w204 from 2012 and for the past 2 years since I have it I was struggling to fix the auto-hold last week I've changed the SAM module, the battery and even the negative terminal but it still doesn't work or it is working rarely. I put it on a tester today and it showed me that when I turn on the ignition the voltage drops to 10.2V and after I start the car it goes to 14.9V .I've noticed that my car had the SAM module changed and now I changed again. And I wanna know if is related with the relay Q4 that I have now or I should change with a Q3 because in the trunk the small battery has a Q3 and I want to know if those 2 are related. Please help me cause I don't know what to do anymore.
Last edited by Albanezu3000; Apr 17, 2024 at 02:02 PM.
