There's been a good bit of discussion and variance in the reported MPG's for the W210 cars with the OM606. I'm planning on doing a road trip to Philly this weekend so I thought I'd fully document it and share my real time MPG figures.

The plan:

I will only fill up when the tank is mostly empty, say down to about 1/4. Since the tank fill is the least accurate part of the test, I thought I'd try the following procedure to increase the accuracy of the fill.

Set the pump handle on "fast" fill for the first 13 gallons.
Set the handle on "slow fill" until it automatically shuts off. (Minimize foaming)
Manually dispense one last gallon (or whatever I can to start with) and do the same exact thing for subsequent fill ups

Of course this all depends on how the pump is set as far as delivery pressure and speed so I will have to monitor it and attempt to ensure accuracy.

On the trip up, I will be driving country roads through small towns so there will be a fair amount of slower driving and some stop and go. The trip back will be all interstate. In both cases, I will drive reasonably, accelerate smoothly but not overly rapidly but I will not "hypermile" it.

Along the way, I will take and post pictures of my gauges when I make stops where I have to shut the car off. During this time, I will suspend my running time clock in order to maintain an accurate average speed calculation.

My results will be posted with MPG's and average speeds. If anyone has a suggestion for improving accuracy, speak now so I can plan on implementing the ideas.

Stay tuned.

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250