C230K M111.975 Won't Accelerate over 4500RPM

[John Jones Jr]

Relocating the MAF is worthwhile as it will give a smoother throttle response but it won't stop oil contamination. Check the engine breathers/pcv including the oil separator and associated hoses at the valve/rocker cover. It might be advisable to clean out your intercooler and boost pipes too.

 

[vijilants]

you forgot to include a link, I suppose

Oops...sorry....

How to stop MAF oil contamination (CLK 230K - W208) - Mercedes-Benz Owners' Forums

 

[sicelo]

That 'victory' was only temporary, as the situation is back as it was before. After disconnecting MAF, performance restored. So I'm now looking for a MAF. I've reconnected my faulty one for the time being, as it is good enough for average driving.

About 2-3 weeks ago the faulty MAF finally allowed 4000+ RPM, although the LTFT were still stuck at 32.

Even better, today I replaced the faulty MB/Bosch MAF with a new Pierburg sensor. Now I have sane LTFT. :bannana:

Will see if this will translate to perhaps slightly better fuel mileage or if I get other benefits. From my drive today I feel that the throttle response is a little better than before, although it could just be placebo effect