Mercedes Forum - Mercedes Benz Enthusiast Forums

Hey Y'all,

Just bought my first merc (C250 (2012) 1.8 turbo, 81k km driven) & its been having some trouble. Acceleration in lower revs seems sluggish. After about 3500 rpm it really gets going.

Clocked a standing 0-62 and best time I managed was 11 seconds in S mode.
Rolling start 10.3 seconds in S mode.

Just changed:
- air filter
- engine oil
- spark plugs
- gear sump packing
- transmission fluid
- transmission filter

Cleaned the cat out too. No errors on the scan tool, fuel pressure is around 5.5 bar in idle and uptown 6.9 bar when revving. Tach meter does blip immediately to high revs in a standing start, mid range pull is pretty strong. Mechanic checked it out and said there's low pressure in the rear fuel pump even though the scan tool shows 5.5 bar. MAF sensor is working and clean.

Need help.