| Checking selector mechanism |
WARNING | Accidents and injury can be caused if a gear is inadvertently engaged while the engine is running. |
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| Before performing any work with the engine running, set the gearbox to position „P“ and pull up the parking brake button to apply the electromechanical parking brake. |
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| Observe safety precautions when the vehicle is moving → Chapter. |
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| You must work through all the tests listed. If the specified results are not obtained, perform „Guided Fault Finding“ using a vehicle diagnostic tester. |
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| 1. Checking operation of selector mechanism → Anchor |
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| 2. Checking ignition key removal lock → Anchor |
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| 3. Checking interlock button on selector lever handle → Anchor |
| 1. Checking operation of selector mechanism |
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| It should not be possible to operate the starter while the selector lever is in position „S“, „D“, „R“ or in the „tiptronic gate“. |
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| When travelling at speeds above 5 km/h and shifting into selector lever position „N“, the solenoid for the selector lever lock must not engage and block the selector lever. The selector lever can be shifted into a driving gear. |
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| When travelling at speeds below 2 km/h (almost stationary) and shifting into selector lever position „N“, the solenoid for the selector lever lock should only engage after about 1 second. Selector lever cannot be shifted out of „N“ position until brake pedal is depressed. |
| Selector lever in position „P“: |
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| Pull up parking brake button to apply electromechanical parking brake. |
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| Briefly press ignition key in ignition lock to reach position „ignition on“. |
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| Do not depress brake pedal. |
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| The selector lever is locked and cannot be shifted out of „P“ position, even when the interlock button on the handle is pressed in. Selector lever lock solenoid -N110- blocks selector lever. |
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| Press and hold brake pedal. |
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| Selector lever lock solenoid -N110- releases selector lever. It is possible to shift into a driving gear. With interlock button on selector lever handle pressed, shift selector lever slowly from „P“ position through „R, N, D and S“ and check whether the selector lever position display -Y6- in the instrument cluster shows the correct selector lever position in each case. |
| Selector lever in position „N“ and ignition switched on: |
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| Do not depress brake pedal. |
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| After a short delay: Selector lever is locked and cannot be shifted out of „N“ position even when pressing the interlock button on the selector lever handle. Selector lever lock solenoid -N110- blocks selector lever. |
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| Selector lever lock solenoid -N110- releases selector lever. Shifting into position „D“ is possible. |
| Selector lever in position „D“, ignition switched on: |
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| Shift selector lever into „tiptronic gate“. |
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| The illuminated „D“ symbol in the selector lever position display -Y26- should go out and the „+“ and „–“ symbols should light up. |
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| The selector lever position display -Y6- in the instrument cluster should change from „D“ to „M1“ when the selector lever is moved into the „tiptronic gate“. |
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| Check interlock button on selector lever handle → Anchor. |
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| Check ignition key removal lock. |
| 2. Checking ignition key removal lock |
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| Pull up parking brake button to apply electromechanical parking brake. |
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| Do not depress brake pedal. |
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| Briefly press ignition key in ignition lock to reach position „ignition on“. |
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| Press and hold brake pedal. |
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| When interlock button in selector lever handle is pressed, it should be possible to move selector lever out of position „P“ without „catching“. |
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| It should not be possible to remove the ignition key when the selector lever is in any position other than „P“. |
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| Shift selector lever into position „P“. |
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| It should only be possible to remove ignition key in selector lever position „P“. |
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| Selector lever can then not be shifted out of „P“ position with interlock button pressed and brake pedal depressed. |
| 3. Checking interlock button on selector lever handle |
| Check that interlock button moves freely: |
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| Interlock button should move easily when pressed without force. |
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| Interlock button should spring back fully on its own when released. |
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| If specified results are not obtained, check that selector lever handle is correctly installed → Chapter. |
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| Check whether selector rod or selector lever is bent. |
| Press the interlock button on the selector lever handle to move the handle into the positions listed below; it should not be possible to move the selector lever into these positions unless the interlock button is pressed. |
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| „P“ to „R“ (also depress brake pedal) |
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| „N“ to „R“ (brake pedal also has to be depressed after a short delay when vehicle is stationary) |
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| If specified results are not obtained, check that selector lever handle is correctly installed → Chapter. |
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