To start with the M119 engines have had surging problems from the beginning..related to throttle actuators. Start by having codes read from the fuel system. Cleaning the throttle & throttle butterfly normally HELPS the problem. Possibly a re-adaptation of the trans will help with the shifting.

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator