Replaced multi function switch and now ABS light is on


New member
I replaced the turn signal multi function switch over the weekend and now my ABS, ESP, and ASR/BAS indicator lights are on. I disconnected the battery before changing the switch. The manual it says “if the voltage drops below 10volts these systems will be deactivated.”

I am getting 12.5 volts to the fuse box. Don’t know where to begin outside that.

Anyone have a recommendation?


Erratic Member
There are at least two different multi-function switches: 05103539AA (MB: A 001 540 47 45 ) and 05103745AA (MB: A 001 540 46 45 )
(that's one possible source of problems)

You might use Search to chase down your indicator light symptoms as if you hadn't played with the switch. That trail may lend clues.


Top Bottom