W204 cdi poor mpg!!

Mel1980

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Joined
Nov 5, 2022
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Your Mercedes
W204 CClass 2 2cdi Elegance
Hi all,

I'm new to this forum and would greatly appreciate any advice.

I have a 2010 cclass 2.2cdi. She's a beauty with 133k on the clock.

Always been good mpg. Averaging 45 around town and up to 69mpg motorway.

Timing chain, flywheel and clutch change 5k ago.

No starting issues or visible smoke. However, the mpg is currently around 28mpg!! I'm confused and don't know why this is.

She was recalled into main dealer for front airbags and they also updated the ecu. Could this be the problem??

Any advice is appreciated
 

Blobcat

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Grange Moor
Your Mercedes
R171 SLK280, Smart R451, Land Rover 110 County SW, 997 C2S, R1250 GSA TE 40th, CBR600FP
Hello and welcome

What temperature is it running at?

Failed stat is common and leads to poor fuel economy
 

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