Emergency running mode functions of electronic transmission control (ETC) - AD27.19-P-3000-02A

Transmission 722.6 in models 129, 140, 163, 170, 202, 208, 210, 463

Electric emergency running mode

In order to prevent any further damage occurring to the transmission after an electrical fault , the gear engaged at that time is retained and the assigned fault code is stored.

The emergency running program starts in the following sequence:

Stop vehicle.
Move selector lever into position "P".
Switch off engine.
Wait for a period of at least ten seconds.
Start the engine.

After a restart the vehicle can be driven in 2nd gear or reverse gear only.

The engaging of "N → D" and "N → R" is very fierce, because the electronic transmission control has been deactivated. The emergency running mode as such can only be reset by means of clearing the cause of the fault and deleting the fault code using the HHT or the Star-Diagnostics tool.

Mechanical-hydraulic emergency running mode

In order to prevent any further damage occurring to the transmission after a mechanical or hydraulic fault ,

the transmission switches into 3rd gear and holds it, or
the transmission switches into the last gear deemed to be "good" and holds it.

This particular emergency running mode is reset by means of switching the ignition off and on.