E-Class (W211) 2003-2009

My mothers E320

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Old 06-03-2009, 09:34 AM
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2005 E320 Wagon
My mothers E320

My mom's E320 just sits in her garage most of the day here in Florida so I thought I would check it out for her.

She needs a tuneup.

Care to let me know what she needs? Here is what I am going to do:

Plugs, air filter, cabin filter

Anything else?

Also, it was running a little sluggish at lights and the CEL came on and the code was P0171. Should I just clean the MAF sensor? It only has 55k miles on it. I hate to replace it. Its $200 or something correct?

Lastly, where do you guys buy your parts? Let me know the link so I can order these.

Thanks for your help.
Old 06-03-2009, 10:06 AM
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03 E320 -wife's car now; 07 Porsche Boxster S - my toy
Originally Posted by apfurste
...................

Also, it was running a little sluggish at lights and the CEL came on and the code was P0171. Should I just clean the MAF sensor? It only has 55k miles on it. I hate to replace it. Its $200 or something correct?

Lastly, where do you guys buy your parts? Let me know the link so I can order these.

Thanks for your help.
Here's the generic definition of P0171 -- was it the only code?:

Fuel trim bank one condition
– The powertrain control module uses the oxygen sensor to calculate the air/fuel ratio of the engine. The computer has recognized a rich or lean condition on one engine bank only.

Probable Cause[s]

1. If bank one and two codes set together suspect fuel pressure or MAF (Mass Air Flow) Sensor
2. Oxygen sensor defective
3. Ignition misfire-repair
4. Fuel injector problem

If you do clean the MAF use the cleaner that CRC makes.

Regards,
paul...

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