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Stan
Stan, Mercedes Technician
Category: Mercedes
Satisfied Customers: 3526
Experience:  Technical support engineer
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Mercedes c270 cold start. I try for 6 to 8 times then it eventually

Customer Question

Mercedes c270 cold start. I try for 6 to 8 times then it eventually starts and runs well.
I have changed all 5 glow plugs and checked for leaks. each plug war electricaly tested before fitting all below 1 ohm (Bosch). When warm NO problems
Submitted: 3 years ago.
Category: Mercedes
Expert:  Stan replied 3 years ago.
Stan :

Hello,
The problem is usually caused by air ingress into low-pressure fuel lines. It is caused by aged o-rings at the ends of plastic fuel lines between the fuel filter and high-pressure pump.

Stan :

best regards,
Stan