Acceleration issue trying to diag

[MercP88]

Hi I have a 2010 CLC180 kompressor manual Petrol. Trying to figure out why there is no boost from supercharger when the engine warms up. From cold start it runs fine and supercharger works until the engine warms up. Once warm boost from supercharger stops and it’s very sluggish,heavy, no acceleration

(mpg seems low to me - getting approx 250mile out of a tank. Car shows averaging under 20mpg)

There are currently know codes showing through obd2 or snap on diag machine.

Have already replaced maf sensor and pre cat lambda sensor initially issue were pointing to these. Doing this removed the codes PO171 P201C - powertrain

I’ve had the car at a German car specialist that checked vacuum emissions etc but couldn’t find anything. Thought I’d put it out on here before booking into Mercedes.

Any other info I’ve missed let me know

 

[LostKiwi]

Rather than take it to Mercedes (who will likely charge a fortune starting with "that will need diagnostics first at £160") if you tell us where you are we can probably suggest a reputable independent to sort it for you.

 

[MercP88]

I’m in Doncaster South Yorkshire.

like I said I’ve had it in one garage I’m familiar with already recently n they couldn’t diag it. I know merc are expensive that’s why I’ve tried dishing it myself buti know they will fix it

 

[LostKiwi]

The place you used wasn't an MB specialist as they were using Snap On not Star (MB factory diagnostics).
MB may fix it but given the vehicle age I wouldn't hold my breath. MB tend to not want to know about anything more than 5 years old.

 

[John Laidlaw]

Try Richard Hollings in York, it far from you (less than an hour anyway) , knows his stuff

 

[MercP88]

Not sure what diag machine they used, I work at vw and got it plugged into there snap on diag machine.

Prob gona n see what they have to say at merc.
York wouldnt be nice drive n would cost a fortune with how it is atm