Merca 270cdi tiptronic! it wan`t to change the gear! only gear one and back gear is functionaly! I drived normaly, stopped the car and came back to start nothing happens untill i removed battery cable and put it back. i started okay but only gear one and back gear was function.I dont know what happened. Thanks foåp an answers! jaani

It sounds like you have a failed transmission on your hands, and yes it just happens that fast, it is called the "point of failure"

read the owners manual on the operation of a tiptronic box. It will probably state that the manual selection of the box is for keeping the gear box in set gears to prevent unnecessary gear changing. So when going down hill select a gear manually and that will use the engine braking capability instead of up shifting as the rpms increase
It is fun to use the tiptronic as a manual box but that is not the real purpose of the transmission design.. IT is to lock the transmission into certain gears to prevent unnecessary up and down shifting of the transmission

hey man did you fix it the problem with the tiptronic, i have the same issue

You need the powertrain control module/processor checked for fault codes

no the oil in the gearbox needs a top up

the problem sounds like mine i had all the fluid and filter in gearbox changed it sorted the problem out
micky

You need to give the car a scan, preferably with VCDS (or VAS at a dealer). If limp mode is activating (lit up gear selections), then it will be storing codes.
The fact that it works to a degree could be good news, the gear box has likely not failed. Could be the F125 selector switch, which is a common fail at this age.

try updating the trans. software i had a similar problem and i fixed it

Hello my e300td had same problem took it to mercedes garage rev sensor had gone wrong they changed this&its okay now hope it helps derek

have you had any transmission services done yet? like a flush sounds like a sticking solenoid but very hard to say with out looking into it please rate -jeff