Out of the blue two days ago I cranked on my ever dependable 420 SEL and the idle immediately raced and wouldn't stop racing. The yellow ABS warning light also came on and stayed on. If you wait long enough (two minutes or so) it will finally slow down to normal---or put it in gear and it wll return to normal idle, but only after burning rubber and jerking the trans big time when it engages at that high speed. It does it every time, whether warmed up or cold. Sounds like computer stuff or electronics at the least which leaves me out in the home repair department. Any suggestions would be much appreciated. Bear in mind that I live far from a MB dealer. Thanks in advance,
Rob Hudson