1994 Mercedes c220's transmission.
My 1994 Mercedes c220 has a strange problem with its automatic transmission. Whenever the car is started (either cold or hot) and driven, the transmission seems to get stuck at gear 1 or 2
unless I try to increase its RPM to about 2800. Once the RPM reaches 2800, the transmission shifts perfectly well at all gears afterwards. It that a normal behavior for Mercedes 722.4 transmission?
Does my car's automatic transmission has some modulator that can be tweaked to improve shifting behavior?
Thank you very much for your help.