c240 power problem....idle fine but no power

solwal

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I have a 2000(x reg 113000 on clock) c240 sport , the engine runs smooth in idle but any attempt to use accelorator causes the engine to go lumpy or misfire...no power... top speed about 4mph . This problem only started after an incident with the key not turning in lock which was resolved with the spare key after the MB service guys failed to diagnose the problem:(.
can anyone suggest a possible cause.... seem to have run out of options many thanks
solwal
 

BlackC55

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Feb 23, 2007
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Location
South coast
Your Mercedes
C43
The most common cause is a faulty air mass sensor. Get a Bosch ONLY.
 

deejaybee

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Location
Surbiton, Surrey
Your Mercedes
Now - W210 E320cdi
Hi, I had some running problems (but not as bad as yours) on my E320 which I suspected was the MAF. The advice that I got from a local specialist was the same as here - change it. Apparently this is now regarded as a service item and it is recommended to change it as a matter of course around 100K miles or at 8-10 years old.

I also got the same advice about buying a genuine Bosch item. Even the likes of Eurocarparts and GSF didn't recommend the pattern ones that they sell!!

I got one from my local GSF who were happy to sell it at trade since it was expensive, I thinK I paid about £160 including VAT. I think it is also available off the 'net for about £150 if you can wait a few days. You can get it from Eurocarparts as well but they will probably be more expensive - if you do buy it from them check that it is new and un-opened, apparently they have a reputation for selling a fairly high proportion of items that have been tried and returned and may not always work properly.

The MAF is very easy to change and will probably only take you abou 10 minutes.

Good Luck,

Dave
 


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