06 Cls 55 amg Boost Problems
 

i have been having problems with my supercharge for a while, what it does is that it will boost sometimes well and other times will not boost 100% you can feel the lack of power, computer showed supercharger mechanical fault p0660.b28 pressure sensor signal implausible.I have tried buying a new pully and still nothing, what could be the problem?

Check here to gain a better understanding of the supercharger. Technical article in German but nothing that can't be translated. Lots of photos, diagrams, and descriptions.

http://www.hehlhans.de/motorg55-7.htm

Perhaps the sensor mentioned in Para 4.1, Item 3, "Ladeluft-druckfuehler" which links to an air pressure sensor.

Could also be the heat exchanger/ IC pump.

Could be you heat exchanger or IC pump!?

Here's another link with troubleshooting guidelines. It specifically mentions MAP sensor B28.


http://auto-prog.tw.ma/128734.htm


Test from beginning to end and you'll find the problem. I'm thinking it is either an intermittent connection, a failed sensor, or damaged wire harness.