Really simple one: fuel supply E240

[wportre]

Hopefully someone can answer this. I'm not on my 123 anymore, and no Haynes available so...
6yo E240. Rough idling. Thinking injectors. Then on hard acceleration, engine diagnosis light and no power (emergency mode"?). 7hr rest and now better than before (smoother and no power issues: light still on of course). BUT noisy fuel pump (that I may just not have noticed before). So, without workshop equipment but with good general skills, what can I do and, your starter for 10: where is the fuel filter?

 

[television]

I have a feeling that this will be the MAF though the coil packs can fail.

why not unplug the MAF and see how it runs

 

[wportre]

Nice idea. (And thanks to Parrot for the instructions.) Clean as a whistle (39k miles). Disconnecting it got the cooling fan very excited and I chickened out. Suspect not the MAF though. Another symptom is a loud clicking from the ?fuel-flow sensor? to the NS of the fuel injecting mechanism. This stopped intermittently (at idle, natch) to be replaced from a turbine-like whine. I suspect the fuel supply in some way. Ideas, including the location of the fuel filter?

 

[television]

open the links that will help you

http://www.detali.ru/cat/oem_mb1.as...722.609722.698&GM=717.463&CT=F&Cat=65S&SID=47

 

[wportre]

Thanks. Definitely not the MAF. The reason I am looking for the fuel filter is to look for any dirt that suggests some might have got to injectors. (I suspect dodgy fuel). Face-full of petrol tomorrow. Oh joy. Thanks again, television.

 

[wportre]

Sorted: was being caused by excessive voltages (in case anyone searches and finds this) which would have faked up wrong MAF readings.Thanks for the MAF pointer.