It's not quite that simple. As you know, ASR is MB's abbreviation for their traction control system. An ASR malfunction light can be caused by DOZENS of different faults.

You need to have the codes pulled to determine where the fault lies.

If you haven't done so, do a search on "ASR light" and you'll get a good deal of info on diagnosing this system.

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Steve
'93 400E