Car not moving in drive and reverse position

[lilzella]

I've a 2003 c180 kompressor,car revs kept going up without any movement.Checked the transmission oil and found it to be milky.changed the radiator and the oil but car still does not move in drive position.Checked codes and found incorrect gear ratio and input speed fault.Any help.

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[AMGeed]

Sounds like you need a new speed sensor in the gearbox. Possibly the torque converter is damaged too if coolant has leaked into the gearbox.

Have you got an independent Mercedes garage locally? (Not main dealer, far too expensive for an 03 car)

 

[grober]

These gearboxes are electrically controlled by the so called conductor plate which acts on the hydraulic valve body. Chances are if coolant has got into this section the gearbox may be irrepairably damaged. It might have been adviseable to change the internal filter at the same time you changed the fluid but chances are it would have made little difference. Have you checked the fluid since changing it- if its still contaminated then that might be your problem and a further fluid + filter change might help but chances are the gearbox is toast. Time to consult a local autobox specialist about a repair or reconned unit I think.
Here's a video about the innards of an autobox- may not be exactly the same as yours but you get the idea.
[YOUTUBE HD]pl55H5sxmUc[/YOUTUBE HD]

 

[lilzella]

Thanks for your quick response,will check d oil to see if it's contaminated and will update u...

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[Auto-mobile]

No oil pressure or torque converter will stop the car moving, not the speed sensor.