» » »

Mercedes-Benz Q&A

Ask Your Question

1999 Mercedes-Benz C280 Question: When waiting at a stop light, car idles very low and it almost shuts down - why?

 

Question

Mercedes_Newbie, San Ramon, CA, December 24, 2011, 22:13
 Rookie

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.

1 Answer
Flag This
  • Answer #1

    patrick mannion from Greg Solow's Engine Room, December 25, 2011, 05:59
    Profile_thumbnail
     Master

    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.

    Flag This
  • Reply

    Mercedes_Newbie, December 25, 2011, 13:59
     Rookie

    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!

    Reply
    Flag This