My transmission dont shift - 1991 Mercedes-Benz E-Class

my guess is car has transmission issues
not stated.
please dont ask for parts that don't exist.
post full symptoms for rational answers. or tests.
no power means???????????????????
1: TRANS SLIPS, means rpm rises but not road speed.
or dont shift
2: RPM does not rise, means weak engine,.
so that is first
3: or transmission does not up shift? period or name gears not attained or skipped.

Have you checked the fluid level? Plus the color of the fluid. It could just need a transmission fluid & filter change.

Take it to a tranmission shop to be road test , They don,t charge to do that,

YOUR TRANSMISSION SOUND LIKE LOW IN TRANSMISSION FLUID. YOU HAVE A FACTORY SEAL TRANSMISSION IF SLIPPING SHIFTING HARD TRANSMISSION COULD HAVE FLUID LEAK. YOUR TRANSMISSION DONT HAVE OIL FILLER TUBE AND DIP STICK.THE VOLKSWAGON DEALERSHIP HAS TO USE EQUIPMENT TO ADD FLUID THROUGH TRANSMISSION FILLER PLUG ON UPPER SIDE TRANSMISSION PAN. IF TRANSMISSION FLUID HAS NEVER BEEN CHANGED LET DEALERSHIP CHANGE TRANSMISSION FLUID AND FILTER AND TRY TO LOCATE LEAK IF FLUID WAS LOW. ALSO MAKE SURE ENGINE FINE TUNED AND TRANSMISSION SHIFT CABLE ADJUSTMENT IS CORRECT.

P0753 Shift Solenoid A Electrical its inside of transmission not very easy to replace it controls the shifting of the transmission
P0763 Shift Solenoid C Electrical its another transmission shift solenoid
P0758 Shift Solenoid B Electrical another shift solenoid now my question to you is your transmission shifting normal have you had any work done to your car recently like changeing any seals on your transmission to have theses replaced by a mechanic its gonna be very expensive i could tell you step by step how to change them with theses codes you should be haveing serious shifting issues if you dont have shifting issues reset codes and see if they come back if they do then it could be in the wireing harness comeing from transmission hope this answers your question happy holidays

FIRST CHECK TRANSMISSION FLUID LEVEL MAKE SURE ITS CORRECT.IF FLUID LEVEL OKAY SOUND LIKE STICKING SHIFT VALVES.CHANGE TRANSMISSION FLUID + FILTER.GET SOME TRANSMEDIC ADD 1/2 TO NEW TRANSMISSION FLUID THIS HELP FREE STUCK SHIFT VALVES IN VALVE BODY DONT OVER FILL ADD IT IN.BUT DONT OVER FILL TRANSMISSION.IF THIS DONT HELP.YOU COULD HAVE VALVE BODY PROBLEM.

CHECK TRANSMISSION FLUID.IF LOOKS BLACK HAS A BURNT SMELL .CHANGE FLUID + FILTER.IF FLUID CHANGE DONT HELP.YOUR SHIFT VALVES IN VALVE BODY STUCK OR SHIFT CABLE NEED ADJUSTING.WHEN YOU DO A FLUID CHANGE YOU CAN BUY A BOTTLE OF TRANSMISSION CONDITIONER IT FREE STUCK SHIFT VALVES IN VALVE BODY.I WOULD ADD 1/2 OF IT WITH NEW TRANSMISSION FLUID.DONT OVER FILL TRANSMISSION WHEN YOU ADD IT IN.

it can be many things.make sure to check transmission fluid.if all is good.your governor valve sticking.or got worn gears.you have sticking or binding accumulator valve. 3 -2 control valve - tv limit 1 -2 or 2 - 3 shift valve train - sticking or binding throttle valve and plunger.2 -4 servo seals leaking - damage or worn 3 - 4 accumulator piston.the 2 3 4 clutches worn or the 3rd roller clutch is damage or missing bearings.Try changing transmission fluid and filter.put some of the transmedic transmission conditioner in fluid.dont over fill tranny.if you got sticking shift valves .it will loosen them up.so it will shift better.if it dont help you have internal transmission problems. .

when we dropped in the transmission we pinched the wire foe the speedometer
we fixed this wire and now the speedo works and the car shifts great.

does your car vibrate when shifting gears ??
your problem could be either worn gears on the transmission or the transmission mounts.
if the car vibrates when shifting then most likely are your transmission mounts, when they get worn the transmission will move a little out of place and you will have problems shifting.
if it doesn't vibrate probably are your gears and transmission will have to be repaired.