Mercedes SL keyless entry malfunction

It sounds like you may have a door actuator or a sensor issue within the car door itself Given the symptoms keyless access failure and an error code pointing to the door handle electronics a defective cable or plug connection does align with a plausible cause Do you have the specific error code that was stored Was there any recent work done on the car door or anywhere nearby that might have disturbed any of the wiring harness As for the repair cost that number could be true depending on what needs to be replaced

Thanks for the quick reply I think the code was something like B1234 or something I don't remember exactly No work was done recently it just started happening Do you think I should try to take the door panel off and check the connection myself I'm nervous about messing something up more but also trying to not spend a ton of money

While I commend your initiative to tackle the issue yourself electrical faults can be tricky Error code B1234 I believe is related to the door handle receiver I would lean towards suggesting that you take your SL to a trusted workshop for diagnosis It may be a simple disconnection and repair if you want to tackle this yourself but if you are not experienced I'd recommend expert assistance

Thanks a lot for your helpful insights I really appreciate it I ended up taking it to the shop and you were spot on It was just a bad connection They re-seated the plug cleared the code and everything is working again The final bill was even less than I expected Cheers