Start of diagnosis

To assess a Tiptronic transmission for which complaints have been received, the information about the fault and the fault occurrence should be as complete as possible.

To avoid extra damage during test drives or faulty diagnosis results, the following items must be checked and corrected (if required) prior to the test drive:

1. Read out fault memory with System Tester 9288 and correct fault. Battery, connectors, ground points O.K.

2. External damage, leaks at transmission (ATF leaks) or final drive (hypoid oil loss), disconnected cables.

3. ATF level in transmission correct, fluid is neither dirty nor does it leave a burning smell. If ATF is dirty or if it leaves a burning smell, it is recommended to replace the Tiptronic transmission if complete removal of the dirt residues cannot be ensured. In addition, the coolant lines and the cooler must be flushed.

4. Engine operation, full opening of throttle when accelerator is in full-throttle position.


If a system fault occurs, the Tiptronic system shifts into a reduced driving program. The warning lamp comes on and the automatic system shifts to 4th gear, irrespective of the selector lever position.

As 4th gear establishes a rigid connection between engine and final drive, you must shift to "N" at a speed of about 30 kph to prevent the engine from stalling. When the vehicle has stopped, turn the engine off.

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