Manual emergency release of transmission lock from inside vehicle is not possible with GA6HP/GA8HP gearboxes from 03/2010
Releasing the transmission lock under the vehicle floor remains possible for towing purposes.
MANUALLY RELEASING TRANSMISSION LOCK
In the event of a power supply interruption, e.g. flat battery or electrical fault, the transmission lock must be manually released, otherwise the wheel will be locked and the vehicle cannot be moved.
IMPORTANT: Secure vehicle against rolling, e.g. with chocks.
Press the brake pedal when manually releasing the transmission lock, otherwise there is a risk that the vehicle will roll when the transmission lock is manually released.
If the parking brake has to be released as well, observe the following procedure:
1. First, manually release the PARKING BRAKE.
2. Then manually release the automatic transmission lock.
NOTE: Release tool is located in on-board tool kit.
Open lid of drinks holder (1).
Lift out drinks holder (1) and rubber mat (2) from drinks holder base.
Fig. 63: Identifying Drinks Holder And Rubber Mat Of Drinks Holder Base
Remove cover (1).
Fig. 64: Identifying Cover Of Drinks Holder Base
Releasing transmission lock
Insert release tool (1) into opening.
Turn release tool clockwise up to stop and press down.
Transmission lock is released!
Fig. 65: Releasing Transmission Lock Using Release Tool
Locking transmission lock
Pull out release tool in direction of arrow.
Transmission lock is locked.
Fig. 66: Pulling Out Release Tool In Direction Of Arrow
MANUALLY RELEASING PARKING LOCK (FROM UNDERNEATH VEHICLE) 6HP TRANSMISSION
For various tasks, it is necessary to unlock and lock the parking lock.
This can be done from inside the passenger compartment or underneath the vehicle.
Before unlocking the parking lock, secure the vehicle against rolling away.
In the event of a power supply interruption, e.g. flat battery or electrical fault, the parking lock must be manually released, otherwise the wheels will be locked and the vehicle cannot be moved.
Manual emergency release of parking lock from passenger compartment is not possible with GA6HP/GA8HP gearboxes from 03/2010
Before removing the underbody panel, always check inside the vehicle to be certain the parking lock emergency release is not fitted.
From the vehicle underbody: Raise vehicle.
Manual emergency release of parking lock Graphic shows: GA6HP gearbox.
Fig. 67: Tightening Bolt With Hexagon Socket (Sw5)
Then unscrew and remove screw (1).
Screw (1) should protrude 1.5 to 2.5 mm above thread lip (A).
Fig. 68: Identifying Protrude Dimension
From the vehicle underbody:
Raise vehicle.
Manual emergency release of parking lock:
Illustration shows GA8HP transmission.
Fig. 69: Tightening Bolt With Hexagon Socket (Sw5)
Screw new micro-encapsulated screw (1) into thread.
IMPORTANT: Screwing in and adjusting of screw to 1.5 to 2.5 mm above thread lip (A) must occur within 3 minutes.
The screw may no longer be turned after 3 minutes (hardening of adhesive), otherwise it must be replaced.
Fig. 70: Identifying Thread Lip Dimension
From passenger compartment
From underneath vehicle with Bowden cable
Clamp lever firmly if permanently unlocking is desired.
Locking
Fig. 71: Releasing Lever
NOTES ON MECHATRONICS (GA6HP19Z/GA6HP26/GA6HP32Z)
Notes
IMPORTANT: After completing work:
Use only TRANSMISSION FLUID.
Failure to comply with this requirement will result in serious damage to the automatic transmission!
IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DISCHARGE (ESD PROTECTION).
Unscrew plug (1) and disconnect.
Fig. 72: Disconnecting Plug
Insert special tool 24 2 390 in sealing sleeve (1).
Fig. 73: Inserting Sealing Sleeve Using Special Tool 24 2 390