Join Date: Apr 2015
Vehicle: SLK 230 - 1998
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SLK 230 has a lack of power from the supercharger. Drives fine but when pedal depressed at speed can over-rev, lack of acceleration, sometimes lurches up into gear. Car has lost speed.
Pressure test (supercharger) shows it is only half the pressure level it should be. No obvious problems, hoses etc... all fine. Valve (within hose block) is also working and engaging correctly. Unsure as to why pressure is down so much.
Possibly slipping belt? Seems unlikely, but possible at over 100K miles. Front of supercharger is loose which is (apparently) strange but all is engaging and running correctly while car stands still and is manually revved.
Car has been into the garage today but they could not find the fault either. Guy worked at Merc for years and didn't charge me but he was a bit perplexed. May have to take to specialist with STAR kit - anyone know of one in Surrey (UK) who doesn't charge an arm and a leg?
Any thoughts on this problem would be great.