I've been getting lousy mileage on my E420 lately. Well, at least since I've replace the ETA (wires toast) and a few weeks later the MAF (voltage code).
I'm guesstimating 15mpg, if I'm lucky. No codes, except for an upshift delay code a few weeks ago - hasn't returned since clearing it.
Until the wiring shorted out in the old ETA, I could get 23-24mpg.
Did I get a bum rebuilt unit? (4mercedes) or is this just a coincidence, and I need to look elsewhere?

Thanks!

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It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein


09 Jetta TDI
1985 300D