Automatic Parking Lock: Notes
This is the first time that an integrated automatic parking lock has been used in an M vehicle. When the engine is turned off, there is no mechanical connection between engine and drive wheels (clutches are at zero pressure and disengaged).
| Index | Explanation |
|---|---|
| 1 | External parking lock lever |
| 2 | Inner parking lock lever |
There is no parking lock button on the selector lever of the M GWS. The parking lock position is determined by the M DCT electronics. The parking lock is engaged with the use of a parking lock electromagnet. This electromagnet is built into the gear selector switch housing and is activated directly by the M DCT electronics. It transfers its movement (stroke) to a Bowden cable. The parking lock Bowden cable transfers the movement directly to the external parking lock lever on the transmission and then to the inner parking lock lever.
| Index | Explanation |
|---|---|
| 1 | Parking lock wheel |
| 2 | Parking lock hydraulic pistons and direction of pressure (red arrow) |
| 3 | Magnet for parking lock sensors |
| 4 | Pressure cone for operating the locking pawls |
| 5 | Spring-loaded parking lock pawl |
The parking lock disengages hydraulically in the transmission. To engage the parking lock using the electromagnet, the parking lock hydraulic components must be at zero pressure.
The parking lock will always be automatically engaged once the engine has been turned off, except in "N".
When in "N" the parking lock is engaged:
- when vehicle remote control is not in the ignition lock (Comfort Access)
- when removing the remote control from the ignition lock
- 30 minutes after the engine has been turned off.