Shifter A/T: Testing and Inspection

Selector Mechanism, Checking

Selector mechanism function test

• In selector lever positions "S", "D", "R" and "Tiptronic gate" the starter motor will not operate.

• If selector lever position "N" is selected at speeds greater than 5 km/h, the selector lever lock solenoid must not engage and block the selector lever. Selector lever can be shifted into driving gear.

• For speeds below 2 km/h (almost standstill) and shifting into selector lever position "N", the shift lock solenoid must only engage after approx. 1 second. Selector lever can only be shifted out of position "N" with the brake pedal operated.

Selector lever in "P" position and ignition switched on:

- Do not operate brake pedal.

• Selector lever is locked and cannot be shifted out of position "P" while locking button on selector lever handle is pressed. Shift Lock Solenoid (N110) blocks selector lever.

- Press brake pedal and hold.

• Shift Lock Solenoid (N110) releases selector lever. It is possible to shift into a driving gear. With locking button on selector lever handle pressed, slowly shift selector lever from "P" through "R, N, D, S"; when doing so, check whether Transmission Range (TR) Display (Y6) in instrument cluster corresponds with selector lever position.

Selector lever in "N" position and ignition switched on:

- Do not operate brake pedal.

• After a brief pause: Selector lever is locked and cannot be shifted out of "N" position despite pressing locking button on selector lever handle. Shift Lock Solenoid (N110) blocks selector lever.

- Operate brake pedal.

• Shift Lock Solenoid (N110) releases selector lever. Selection of position "D" is possible.

Selector lever in position "D", ignition switched on:

- Shift selector lever into "Tiptronic gate".

• Lit "D" symbol in Selector Lever Transmission Range (TR) Position Display (Y26) must go out and "+" and "-" symbols must light up.

• The Transmission Range (TR) Display (Y6) in instrument cluster should switch from "PRNDS" to "654321" when selector lever is shifted into "Tiptronic gate".

If specified values are not obtained:

- check locking button on selector lever handle

- Adjust selector lever cable => [ Selector Lever Cable, Adjusting ] Adjustments.

- Check ignition key removal lock.

Ignition switch key lock, checking

- To reach position "ignition on", briefly turn ignition key lightly toward right.

- Press brake pedal and hold.

• It must be possible to shift selector lever out of position "P" without "hitching" while locking button on selector lever handle is pressed.

- Switch ignition off.

• It should not be possible to remove the ignition key when the selector lever is in any other position than "P".

- Place selector lever in position "P".

- Remove ignition key.

• It must be possible to remove ignition key only in position "P".

• Selector lever cannot be shifted out of position "P" with the locking button pressed and foot brake operated.

If ignition key removal lock does not function as described, check Access/Start Authorization Switch (E415) using Vehicle Diagnostic, Testing and Information System (VAS 5051) in "Guided Fault Finding" function.

Locking button on selector lever handle, checking

• Ignition switched on

Locking button on selector lever handle must be pressed for the following shifts. If it is not pressed, the selector lever cannot be shifted into the specified position.

• "P" to "R" and also press brake pedal

• "D" to "S"

• "N" to "R"; in standstill, also press brake pedal after long wait

• "R" to "P"

If specified values are not obtained:

- Check whether selector lever handle is installed correctly => [ Selector Lever Handle ] Selector Lever Handle

- Adjust selector lever cable => [ Selector Lever Cable, Adjusting ] Adjustments.