A1EK

I noticed today that my supercharger did not seem to be working , as there was no whine I could hear and the distinctive 'pull' and big increase in speed was not noticable. This happened when I started the car and raced off straight away as I was chasing a freind, but strurggled to make distance as the supercharger was not working.! otherwise the car behaved and drove fine, just slower.

When I got home after 20mins I had to go back out again, but now the car was back to normal with the supercharger whinning away and pullin hard as normal?>

I've had a look at the forums and it seemed that perhaps a throttle reset is needed which I can do, but I also read that a 'Valve Reset' would be an idea, does anyone know what this is and how to do it?

Second point, I noticed once when I cleaned the MAF there was some light oil on the sensor and in the pipe work, which after I cleaned the sensor I found the car run much better, has anyone else find this?.
Lastly, Is there a noise you here when the supercharger is engaged at first for about 1-2 secs a kind of rattle noise near the air filter?

Thanks

humbfig

There are some threads on this issue. After some miles the engine ventings get clogged (there are some under the inlet, hard to get to). I just had mine replaced (some of the parts were redesigned by MB so it would work better). It's a good thing to do because the MAF won't last forever when exposed to oil vapour. Cleaning it won't do magic forever.
Here are the codes of the parts replaced on a 98 CLK2.0K:

MA1110180335
MA1110181882
MA1110183182
MA4030780074
MA0001402787
MA1111411280 2X
MA0039970786 2X
MA1110100091
MA1110181582
MA1110181682
MA2105408081
MA0020940182 2X
MA0149976845 8X
MA0029972490 6X
MN007603012405 2X

This parts cost about 150 euros.
I didn't do it. I'm just trying to help someone who might be thinking to do it on his own. I probably would have done it if I had this list......

A1EK

Thanks