Throttle Body Issues?

[OjBlack]

Hi there,

I have a 2004 C180K WDC203 with 100,000 miles.

Of late I have experienced-

1. A heavy judder accompanied with an diesel like engine note for a few minutes when the engine the car is on D and R gear.

2. High idling revs.

3. Slow acceleration.

4. Excessive smoke when the engine finally picks up speed ( mostly while overtaking or joining the motorway).

5. Periodically the engine light comes on.

I have taken the vehicle for diagnosis at an independent Mercedes specialist and they said the fault is a Faulty Throttle Body. Before I embark on carrying out any expensive and unnecessary repairs I would like to know if the MAF sensor would also be a culprit.

Thanks

 

[jaymanek]

If its a faulty MAF, it will normally register a fault code on this model.

Throttle body fault will show as a throttle body fault.

As they both control the air fuel mixture, id go with the diagnostics.

How are you seeing the excessive smoke? Its freezing at the moment?

 

[OjBlack]

Thanks jaymanek, the smoke in recent times ( I can see it from my rear view mirror) only appears for a few seconds as the vehicle gathers speed during bursts of rapid acceleration. Is that something to worry about?