My 1997 E420 seems to be only running on 4 cylenders. I has lost a lot of power does not like to rev.

I am not sure what happened, but here are the symptoms.

The car refused to accellerate when going up a hill at about 50mph. I floored the accellerator and the check engine light came on. If I try to accelerate (somewhat hard) the check engine light starts flashing.

I took it to a Mechanic in Atlanta who read the codes.

PO308
PR307
PO305
PO306
PO300

PO410
PO173

He seems to think its the O2 sensors. My regular guy (in dallas) thinks its the Air Mass Meter.

Before I start throwing parts at it, I would be grateful if anyone can provide input.

This car should fly when you put your foot down.

Regards

Al