c240 s/98 Stalls on gear selection

[proteo]

Another problem the dealer cant solve.. Only in winter or damp mornings. Me car starts fine, choke works etc and car idles around 1400. As soon as I engage Drive or Reverse to move it, the revs fall below 500 and the car stalls. If I engage the gear and release the footbrake quickly it manages not to stall??? This only happens for the morning start, the car is always fine the rest of the day, once warm idles around 600. Sounds like fuel chamber leak or something weird maybe a collant sensor? Dealer has been trying to identify the prob since new but I've had no joy with them at all.. Appreciate any suggestions. Thanks

 

[kamalpatel]

Another problem the dealer cant solve.. Only in winter or damp mornings. Me car starts fine, choke works etc and car idles around 1400. As soon as I engage Drive or Reverse to move it, the revs fall below 500 and the car stalls. If I engage the gear and release the footbrake quickly it manages not to stall??? This only happens for the morning start, the car is always fine the rest of the day, once warm idles around 600. Sounds like fuel chamber leak or something weird maybe a collant sensor? Dealer has been trying to identify the prob since new but I've had no joy with them at all.. Appreciate any suggestions. Thanks

Has the MAS Sensor been changed?? Try it as a test. I found my C240 quite lumpy on cold start last year then had a couple of other problems but changing this sensor seems to have improved cold start/idle a lot.

 

[steveperry]

Yep I would agree with kamal, when my car had MAS problems it also suffered the odd random cut-out on moving away from idle.

S.

 

[proteo]

Thanks chaps will check it out with the gargage, by the way silly question what is MAS?

 

[OlafMaxwell]

MAS Mass Air Sensor....