I came home yesterday and the neighbors son was changing the battery in her 2001 ml350. afterwords the asr esb light was on. I searched and it looks like it could be a problem with brake switch but i also saw a thread that asked if someone had changed the battery and the result was a light on. what would cause this?

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1994 C280
2009 VW Tiguan
1993 Toyota X-tra Cab SE-5


1973 220D ... Gone, but not forgotten
1991 Alfa Romeo 164L Gone, wife MADE me forget it

2006 Hyundai Tucson... just straight out FORGOTTEN!