cruise control

1991 MERCEDES BENZ 190D
150,000 MILES • V8 • 2WD • AUTOMATIC
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MOTOPEDLR
  • MEMBER
  • 3 POSTS
The cruise control on my 91 mercedes disengages after a few seconds.
Feb 1, 2011 at 12:04 PM
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DOCHAGERTY
  • ✓ASE Certified Mechanic
  • 9,606 POSTS
  • ASE Certified Mechanic
Try replacement of the brake light switch.
Feb 1, 2011 at 12:13 PM
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MOTOPEDLR
  • MEMBER
  • 3 POSTS
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.
Feb 13, 2011 at 10:21 PM
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DOCHAGERTY
  • ✓ASE Certified Mechanic
  • 9,606 POSTS
  • ASE Certified Mechanic
Sorry, I dont know
Jan 3, 2013 at 6:18 AM
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