1991 Mercedes Benz 190d Repair Question
Topics covered: Brake light switch, Brake pedal, Cruise control.
Mileage: 150,000 miles.
Mileage: 150,000 miles.
Asked on February 1, 2011
Cruise control
The cruise control on my 91 mercedes disengages after a few seconds.
Asked by motopedlrAnswer
Replied on February 1, 2011
Try replacement of the brake light switch.
Replied on February 13, 2011
I tend to think it is a vacuum issue since I have a "dead spot" at light acceleration between 1200 and 1600 rpm. I did try to engage the cruise with a very light pressure on the brake pedal and there was NO indication of engagement. If I try to engage cruise normally it engages and then with any slight elevation or declination of terrain the cruise disengages. Oh, I really appreciate your brake switch suggestion, but think I ruled it out. Please advise if I am mistaken.