Last week, my 1987 260E would not hold an idle. It would stall at most stoplights. The Antilock light on the dash was illuminated. Sometimes the SRS light would come on as well.

I made an appointment at my local independant MB shop, and on the way there, the antilock light on the dash went out, and the idle came back to around 900 rpm, and no stalls.

This has since happened 2 more times. I finally got it to the shop when the symptoms were present. The shop replaced the belt tensioner and adjusted fuel mixture and cleaned the throttle body.

I picked it up from the shop today, the idle is low, about 500rpms, but it does not stall. The ABS light is still illuminated, I am 450 dollars poorer and the car is still not right.

Can someone on this board enlighten me on what this gremlin could be? I do not have a good wiring diagram, can someone tell me what illuminates the ABS? I think if I trace that circuit, I will find the root cause to this issue.

Thank you.
Mills Stansberry
Greenville SC