starting issue

[joecdi]

My mercedes c class w203 estate 54 plate 220 cdi having problems occasionl with starting can drive for six weeks then won't start turn key just turns over wait for a couple of minutes then it goes or sometimes have to put in first gear and push then goes then it's ok and starts first time for a while then suddenly dose it again weeks later any suggestions cheers

 

[brucemillar]

Crank Position Sensor (CPS). Common fault. Get it plugged in to STAR to check for stored errors.

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[joecdi]

Cheers