After a 150 mile trip, by 07 E320 Bluetec became extremely sluggish and threw a P0101 (Mass air flow) code. I bought two new Mercedes MAF's and installed them (another story entirely). Car still runs the same. Erased codes, changed fuel filter (just in case). The car when first driven after being started runs fine, accelerates well, just like it should. But as soon as you slow down it loses all power. Doesn't misfire or stall at all just very very sluggish. You have to feather the go pedal to accelerate at all, if you push it too far it just slows down. Hills are virtually impossible. Does the computer have to be reprogrammed when new MAF sensors are installed (that's stuck in my head that may be the case). Any input is appreciated, I'm stranded at home...

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Muleears
'07 E320 Bluetec 133K my DD
'04 Jaguar XJ8 VDP, 34K
'10 Hyundai Accent 60K Grocery Getter
'02 VW Golf soon to be on the road again
'97 E300 Diesel Son's DD
'61 VERY tolerant wife

Hampton Roads, VA USA

Gone but not forgotten:
'67 250S 95K
'86 300SDL
'87 300D Turbo, 364K! R.I.P.
'98 E300 Turbodiesel, 213K
'02 S420, 164K
'01 Prius 138K