24 34 ... Unlock transmission lock electronically

For various tasks, it is necessary to unlock and lock the parking lock.

Before releasing the parking lock, secure the vehicle against rolling away.

• The emergency release is only possible if the engine does not  start and the starter is turning.
• If the emergency release must be activated although the engine starts, the fuse for the electrical fuel pump may be pulled.
• The emergency release is active for 15 minutes.
• As soon as a wheel speed signal is recorded, this period will be extended by another 15 minutes.
• After this period of time, the transmission lock will be engaged without a message.
• The chronological information depends on the battery capacity.
• Only specially trained Service personnel are permitted to operate both the mechanical as well as the electronic emergency transmission release system.
• The vehicle must be raised and the underbody panelling removed in order to operate the mechanical emergency transmission release system.

Unlock transmission lock electronically 

• Switch the ignition on.
• Apply the brake pedal and hold it down during the entire procedure.
• Press start/stop button.
• The starting operation may last for some seconds in low ambient temperatures and for diesel engines.
• As soon as the starter motor can be heard to operate
• Press and hold down the release button (1)

Fig 1: Identifying Transmission Release Button

1. The specified time must necessarily be complied with!
2. Push selector lever (2) forward up to point of resistance and hold for 2 seconds.
3. Release the selector lever and quickly move it forward by another level again.

Fig 2: Pushing Selector Lever

• The selector lever position N is displayed in the instrument cluster.
• The transmission lock is now electronically unlocked.
• Release the brake pedal after the transmission lock has been successfully unlocked.
• Leave the ignition switched on in order to subsequently move the vehicle.
• The transmission automatically shifts into P when the ignition is turned off.

Fig 3: Screen Display - Gear Position N