You need to state what model you own. I deduct you own a gas powered 190E, but more info would be helpful.

While I am not as accomplished as many of the guys around here, I will offer up what I can.

First- don't make changes without writing down, marking, or photographing what you are adjusting.

Will the car rev freely in lower gears? Are you speed limited or RPM limited? What changes did you make?

Good luck.

__________________
'90 300SE 298k
-300K and it gets put into retirement.
'80 300D 255k Purchased new by family in 1980.

Had a:
1973 220 (gas)
1980 300SD
1992 400E