Just returned from a round trip to the FROG event in Charleston, SC. Going to Charleston we averaged 15.4MPG. Drove around 60MPH with no significant winds. Returned today driving at around 70MPH, with bad
headwinds, and averaged 12.5MPG. It pays to go slow but I needed to get home and re-winterize today as the temperature here will be in the mid-20's tonight!
Although I doubt it impacted my return leg MPG I'm off to the M-B dealer in the AM to get the DEF system checked out, again
. I have a Check Engine Light, DEF Light (in count down mode
), and a P206E error code showing on my Scan Gauge. This is the second time the DEF system has had major issues.