[Luvofspeed]

Hello all,

I have a W211 E55 with extensive aftermarket accessories for the audio/visual system. The car was a show car and since I've owned it the convenience features have been disabled and it starts beeping intermittently. When running diagnostics multiple battery control modules errors are triggered. I've replaced the trunk battery, accessory battery, accessory battery relay, and battery control module. After doing all that I've also reprogrammed and updated the firmware for the BCM. Still having the same problem. The system has full voltage but the BCM still thinks it does not. Is there some way to bypass the BCM or "trick" the car into not checking voltage?

Thanks in advance for any advice.

 

[HalfbreedCharlie]

Hello all,

I have a W211 E55 with extensive aftermarket accessories for the audio/visual system. The car was a show car and since I've owned it the convenience features have been disabled and it starts beeping intermittently. When running diagnostics multiple battery control modules errors are triggered. I've replaced the trunk battery, accessory battery, accessory battery relay, and battery control module. After doing all that I've also reprogrammed and updated the firmware for the BCM. Still having the same problem. The system has full voltage but the BCM still thinks it does not. Is there some way to bypass the BCM or "trick" the car into not checking voltage?

Thanks in advance for any advice.

Hey I was wondering if you were ever able to get your question answered because I didn't see any one answer you and I'm wondering the same thing

 

[HalfbreedCharlie]

Has ANYONE been able to find a way to Bypass the BCM on a W211? I am trying to Remove this completely from my Electrical system and have been asking Questions for Months and No One ha s Responded so I figured either No one knows or No one wants to share the Info

 

[edfreeman]

Your car is not an AMG, there are far more members on the forum in the regular W211 section. Ask there.

 

[jmluke1]

Your car is not an AMG, there are far more members on the forum in the regular W211 section. Ask there.

Mines amg and I want to know.