The engine should idle at 650-700 RPM, in or out of gear. IF the idle speed is too high(800) then you will have a harsh engagement
Have the trans pan removed & fluid/filter replaced. IF the trans still shifts too hard then a modulator pressure check & adjustment is in order.

__________________
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