Cls 55 amg misfire. Help

[Montana 55amg]

Update still **** !!!

I've had 550c injectors put in about 6 months ago, new maf/air flow arrived today. If that fails I think a trip to Mercedes is in order. A friend says maybe a exhaust valve ???

 

[Montana 55amg]

By the way all O2 sensors are fine !! There is 4 I believe.

 

[Montana 55amg]

Would plugging it into star give me a exact cause other than a generic code reader ??

 

[Montana 55amg]

Crank sensor ??? This is doing my nut in.

 

[Montana 55amg]

Cam sensor ??

 

[BlackC55]

Before you throw parts at it get it diagnosed properly.

An independent (like us) or a main dealer can help.

It could be a spark plug, plug lead, coil, injector lack of compression or an ecu issue.

 

[7om]

Did you find out what the problem was?