If you haven't done already, clear all the codes and start over to see which ones come back. I spent some time chasing after codes that must have been from the previous owner and had nothing to do with my issues.

I had the same issue on my '94 E320T S124/M104 (severe miss under load but fine at low power and idle) and it turned out to be one of the ignition coils; while I was in there, I replaced all three coils, the spark plugs and the plug wires. Make sure you use the correct plugs and wires.

Best Regards,
Rob

PS - I'd also be curious to know what you're using to pull those codes.

__________________
Robert Fini

'12 ML350 BlueTec, 111k
'06 E320CDI (x2)
'05 T1N Sprinter 2500/Pleasure-Way Plateau TS, 72k
'97 C36AMG, 325k (son's)
'94 E320T, 249k
'93 190E Sportline LE, 168k (daughter's)
'84 190E-2.3/5spd (Stage Rally Racer)
'66 230 W110 Sedan (Barn Find, Vintage Racer build in progress)