Hello everyone. Just purchased beautiful black S420 w/130K.
The transmission is not shifting from first gear no matter what I do. I tried to go from first - up - nothing. Wanted to check the fluid - could not find dipstick. Just the thing behind the engine with the handle, but no dipstick attached. Tried OBD and received code po748 " Pressure control solenoid electrical" No idea, whether it is internal part or external and even if it is a transmission part. If there is anything you would suggest on this matter??? Greatly appreciated your help.