How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Marty Your Own Question
Marty, Mercedes Technician
Category: Mercedes
Satisfied Customers: 53010
Experience:  Bosch Certified Master Tech. Over 35 years experience.
Type Your Mercedes Question Here...
Marty is online now
A new question is answered every 9 seconds

1992 r 129 SL 500. Car studders hard and almost shuts off

Customer Question

1992 r 129 SL 500. Car studders hard and almost shuts off after rain, damp morning or wash. Distributor cap and rotor just changed for $600.00
Submitted: 1 month ago.
Category: Mercedes
Expert:  Marty replied 1 month ago.

Hi, my name is***** the car only acts up in wet or damp weather I would suspect the ignition wires and ignition coils. Also, there are ceramic noise suppressors underneath each ignition rotor inside the distributors. They can sweat moisture and cause this problem. If the ceramic noise suppressors were not replaced I would suggest doing so.

Let me know if you need anything else. Don't forget to rate my service as this is the only way that I can receive credit from the website for answering your question.

Expert:  Marty replied 1 month ago.

Just checking in. Do you need anymore help with this? Was the information helpful?

Customer: replied 1 month ago.
Noise suppresors were changed less than a year ago along with rotor and caps. New caps and rotors put on last week .This car studders so hard you can here the belt slip . After a while it general clears up . Most times if I pull over and restart the car it runs better.Could there be something getting a bad signal from the water telling it to go into limp mode spontaneously ? Off and on like a light switch.
Customer: replied 1 month ago.
Mechanic said coil and wires were good! I will have him check again.