help. strange power loss on c280

[monaco]

Chaps

I have a late 98 C280 v6 and it has started a rather strange habit, if I try and hussle it along and depress the Accelerator to the floor, it initially starts to pull then more often than not the power will drop, revs reduce to around 3000rpm and if you continue to try and accelerate it just doesn’t play ball.

Almost feels like it has gone into some sort of safe mode ? All you can then do to fix the situation is to pull over ( when you come to a stop it trys to hop forward ) and turn the engine off, restart it and then you can pull away again with full power.

The only way I can stop the happening is to only use two thirds accelerator at most.

Dose anyone have any ideas ?

Cheers

[JustTheTip]

No lights come on on your console? And do you have a kompressor?

Tip

[monaco]

No Lights come on the dash, and no kompressor on the V6.

Beginning to think it might be a missfire at higher revs which throws the ecu into a fit.

Any suggestions would be handy though

[thesilverfox]

You need to have the fault codes read
you have current codes and stored codes, most of the problems you get are air flow meter faults which show up as fuel trim faults ( P0171 )

[GregE240]

Monaco, sounds like Mass Airflow Sensor to me.

Mine did this back at 98K.....

Be prepared for a shock mate.....if it is, you're looking at nigh on £300 for the bloody part. It sits in the airbox tube between the air filter and the inlet manifold on the LHS of the engine as you look in.

Get it to a dealer / indie with the necessary Star Diags kit to read the ECU.

HTH,
Greg

[thesilverfox]

Dont buy one from your Mercedes dealer
Get one from Eurocar Parts just the same but loads cheaper. use them at work all the time.