What does a E320 Bluetec Mercedes Diesel get for fuel mileage?!

I take my Mercedes E320 Bluetec on a 680 mile road trip to test the fuel economy and reliability post repairs. After the road trip I got a hand calculated 32.7 mpg over 687 miles.
#diesel #mercedes #roadtrip #bluetech #tuned

[@ksunofficial]

Hey budd what make year and model is this?

[@pamed76]

I just saw that your coolant temp is too low. It should be around 85 Celsius. Try to diagnose what the reason for that is before throwing parts at it.

[@johnramsayskier]

It’s the MAF and a Thermostat that is misbehaving accordingly, I appreciate the observation and am tracking the problem, getting into the car again this week!

[@johnnyionescu-yr6sk]

What do you think of the bluetec looking at a couple high mileage ones. One with 200k for 4.5k has my attention. Currently have a 1997 E300D and I'm reluctant to upgrade to a newer bluetec as I get 32-33mpg and it only has 176k. Did your mpg improve once the issues were fixed?

[@ZoSkiLuv]

Your temperature is too low. It should ideally be around 80 c on the gauge actually a little higher. The engine is running too cold. You need to change your thermostat. I have a 2006 e320 cdi and had the same issue. When I changed the thermostat, efficiency went up around 15%. Nce car.

[@johnramsayskier]

Good to know! It was also decently cold out when I drove it! I’ll be driving it here again soon and will verify! I appreciate the tip, I’d love an 06 CDI, I just got the Bluetec because it was impossibly cheap

[@therealryan55]

Wonder what happens if you run it dry now that the fuel gauge isn’t working quite right

[@johnramsayskier]

As it happens, just add fuel and re-prime 😏