Emergency Default Mode, Function - GF27.60-P-3012ANI

Transmission 725.0 in model 253 

Function requirements for limp-home mode, general 

• Internal combustion engine running

Limp-home mode, general 

In order to guarantee a safe driving condition and to avoid damage to the automatic transmission, the fully integrated transmission control unit (Y3/8n4) switches to limp-home mode in the event of critical faults. In the case of solenoid faults, the affected gear is blocked and no longer actuated. As a result the vehicle can be brought to the nearest Mercedes-Benz service operation.