Close
Car Questions
RepairPal is your advocate for car care advice and guidance

When waiting at a stop light, car idles very low and it almost shuts down - why?

(1999 Mercedes-Benz C280)
in San Ramon, CA on December 24, 2011
I have to set the transmission to "Neutral" while waiting at a stop light, otherwise the car may shut itself off or it shakes violently threatening to shut down. What can I do to have the car idle when stopped, and on "drive," like it does when in "neutral?" My interim fix (setting the transmission to "neutral," sometimes leaves me unable to get the transmission to engage when, as the light turns green, I set it to "drive" again and wish to move.
Displaying 1 answers & 1 comments
Popular Answer
It could be many things, unfortunately and without experiencing the problem first hand or being able to do some basic diagnostic tests its hard to say. It could be a vacuum leak, and engine that requires cleaning the throttle body, spark plugs and a "tune up" or a problem in the electronic idle control system.
on December 25, 2011
Thanks for the Greg. I agree, I suspected it could be a variety of things. For some reason, becuase it is a Mercedes, I suddently feel clueless and aprehensive to dive into it as I've done with all of my previous automobiles. BTW, I checked your website (http://www.gregsolowsengineroom.biz/) - I liked the original spelling of the word "Excellence" by your picture. Thanks again Greg. Merry Christmas!
RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide. Learn more

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
someone tried to replace radiator of wrong size and he tried to jimmy rig the fan. i now have correct parts and would...
it cranks and idles snoothy but will not take gas if Ipush the gas pedal it will spit and spudder sometimes it will d...
Didn't find what you were looking for?