Brake Switch
Thread Starter
Junior Member
Joined: Oct 2008
Posts: 54
Likes: 0
From: Minneapolis, St. Paul, MN
2008 E350 4Matic
Brake Switch
Hi Guys,
I have search around for these messages "ABS ESP BAS PLUS AIR SUSPENSION WARNING LIGHTS" for our w220 what I have found is some said brake switch is bad some said rear wheel speed sensor bad. Can any one of you tell me where is brake switch locate? something I might want to try because not that expensive. on the rear wheel speed sensor how can I tell which one is bad beside connect it Star Diagnostic? I want work on it this weekend. Thanks so much.
I have search around for these messages "ABS ESP BAS PLUS AIR SUSPENSION WARNING LIGHTS" for our w220 what I have found is some said brake switch is bad some said rear wheel speed sensor bad. Can any one of you tell me where is brake switch locate? something I might want to try because not that expensive. on the rear wheel speed sensor how can I tell which one is bad beside connect it Star Diagnostic? I want work on it this weekend. Thanks so much.
Member
Joined: Jun 2010
Posts: 84
Likes: 5
2002 s500
If its anything like the W140, it could be any of them (speed sensors). There's probably 1 on each wheel. Unless you have an oscilliscope, you may not be able to determine if its working or otherwise. As a preliminary you can test the resistance on each of them to see if there is one that is shorted or open. I know with the W140, it was the passenger side rear that was bad and I had to drill it out as it was rusted firmly into its socket.
Before hacking the system, I would first get the scan codes read to confirm that its not something else that's wrong. Using the "red car" theory is not that relaiable
Good luck.
Before hacking the system, I would first get the scan codes read to confirm that its not something else that's wrong. Using the "red car" theory is not that relaiable
Good luck.
