Hello all,

My 96 C220 has begun to stumble at higher rpm (>3800) and then hold the gear almost to redline unless I back off for a fraction of a sec, then upshifts.

The stumbling is not unlike the rpm limiter kicking in when reving up to 4000 in park.

I just replaced the MAS tonight and drove it a few miles, but the symptoms remain.

The car has 121k miles and I had the idle control valve replaced about 3k miles ago.

Any suggestions would be appreciated!