Realistic MPG / L/100km / Km / L (C200 - OM646.811)
Thread Starter
Newbie
Joined: Feb 2025
Posts: 14
Likes: 4
From: (Denmark) Copenhagen
W204 C200, 2007
Realistic MPG / L/100km / Km / L (C200 - OM646.811)
I have a 2007 C200 CDI (OM646.811) and i have a feeling that there is something wrong with my fuel consumption, but i am not sure, therefore i would like to here if you think this is normal?
The measurements here are NOT from the trip computer, as it is way to positive about MPG than what i actually achieves, so these numbers are real numbers from fill-up to fill-up.
I do mixed driving, and i have an average of 30.6 MPG (13,01 KM/L / 7.7 L pr. 100km)
Last fill up with lots of slow driving i got 35.73 MPG (15,19 km/l, 6.6 L pr. 100km)
This is the HIGHEST i have ever been able to achieve with mixed driving.
The highest of all time was when i filled the tank up when the engine was hot (i had been driving for 2 hours straight), and drove directly on the highway with 70MPH cruise control for 130km, and filled the car again just off the highway. There i got 41.89 MPG (17,81 km/l, 5.6 L pr 100km)
Does this sound normal to you or would you recommend me to get my injectors or other things checked?
My car is not blue-efficiency, just normal, no factory dpf, though fittet but open filter (the one you just fit underneath the car after the catalytic converter).
I haven't owned the car for a long time, what are your thoughts on this, what do you achieve in your OM646 engines?
The measurements here are NOT from the trip computer, as it is way to positive about MPG than what i actually achieves, so these numbers are real numbers from fill-up to fill-up.
I do mixed driving, and i have an average of 30.6 MPG (13,01 KM/L / 7.7 L pr. 100km)
Last fill up with lots of slow driving i got 35.73 MPG (15,19 km/l, 6.6 L pr. 100km)
This is the HIGHEST i have ever been able to achieve with mixed driving.
The highest of all time was when i filled the tank up when the engine was hot (i had been driving for 2 hours straight), and drove directly on the highway with 70MPH cruise control for 130km, and filled the car again just off the highway. There i got 41.89 MPG (17,81 km/l, 5.6 L pr 100km)
Does this sound normal to you or would you recommend me to get my injectors or other things checked?
My car is not blue-efficiency, just normal, no factory dpf, though fittet but open filter (the one you just fit underneath the car after the catalytic converter).
I haven't owned the car for a long time, what are your thoughts on this, what do you achieve in your OM646 engines?
Super Member
Joined: May 2024
Posts: 506
Likes: 124
From: Northern Indiana
2014 c300 w204.080 3.5 v6
There is no measurement for miles per gallon it's actually a calculation bases off many factors so it's not 100% accurate. Not accurate enough to base repairs or problems off of it.
Thread Starter
Newbie
Joined: Feb 2025
Posts: 14
Likes: 4
From: (Denmark) Copenhagen
W204 C200, 2007
@RobertR728 Let me correct. My numbers are not measurements from the computer. It is from me, filling the vehicle to the top noting odometer, driving, filling to top again, writing odometer and calculating the MPG.
