Back when you wrote this I was doubtful I would see that because my mileage numbers never got there and yesterday I discovered why: A faulty crank position sensor finally quit and stranded me (at home) but 2 hours later all was repaired.

Since the beginning of this year the car felt a bit sluggish and I was spending way too much time at the gas station. My best combined city/highway mileage was about 13-14 mpg and best 100% highway was about 21 mpg.

After the new sensor was installed, my combined city/highway mpg (based on commute to work) is 22.2mpg and I will find out this weekend what the all-highway mpg is when I drive to the Delaware beaches. (I am expecting that to be at 28-30mpg, which is about where it was when I got the car.)

This sensor could perhaps be my most costly repair when I consider that 1/3 of the ~600 gallons of fuel I have purchased since the beginning of 2013 has gone to waste (~200 gallons @$4=$800.00) plus $200 for parts & labor for the new sensor.

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2008 E350 4matic / Black/Anthracite

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Gone but not Forgotten:
2001 E430 4matic, 206,xxx miles, Black/Charcoal
1995 E320, 252,xxx miles, Black/Grey
1989 260E, 223,00 miles, Black/Black