E320 CDi Fuel economy

E320_CDi

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E320 - Year 2000, 130,000miles. Hi - Just recently, I've noticed that my fuel economy has gone down from 37-40, down to approx. 33. Any idea what could have caused this drop. I'm hoping to get the ATF oil changed this week and then the MAF... thanks
 

Markieboye

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Stafford
Your Mercedes
W210 E320CDi Estate 255000 miles
fuel Leak
low tyre pressures
turbo not boosting fully
thermostat faulty - engine cooler than it should be
right foot :D

Mark
 

television

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2002 SL500, 216 CL500, all fully loaded
What is the max engine temp,,if it is below 90 ish it will be thirstier
 

turbopete

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2017 '17' Ford Mondeo 2.0TDCi ST Line X 180 (sorry)
also the heater plugs can make a difference, or at least they do on earlier, non cdi engines. if theres a glow plug off, i lost about 4 mpg with the c250 turbodiesel i had
 

OlafMaxwell

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W210 E320 CDI Estate
Interesting post this.....mine has just done same thing, consistent 38.5mpg but about two weeks ago went down to around 34mpg. So its MAF??
 
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