Trunk / Liftgate Motor: Service and Repair
Rear Lid Drive Unit
1 Rear lid left drive unit
There are different versions of the drive unit that can be recognized by the drive forks.
Some drive forks have a self-tapping bolt - 7 - that is installed in both fork halves and there are some drive forks that have a self-tapping bolt - 7 - that is installed in only one fork half.
The bolt - 7 - has different tightening specifications.
• Roof panel trim removed.
• Loosen D-pillar trim in drive unit area or push carefully to side.
• Remove or install drive unit only when rear lid is completely open.
• Before removing driving unit, loosen lock nuts on eccentric bolts.
• Remove electrical connector - 2 -.
• Loosen lock nut on drive unit.
• Eccentric bolts must be loose in hinge arm hole.
• Release tension on eccentric bolts with a brief turn to the right, if necessary.
• Remove the screw - 5 - on the bracket - 3 -.
• Remove screw - 7 - on hinge arm and remove drive unit - 1 - from the side.
2 Electrical connection
• Remove drive unit before removing.
3 Bracket
• Bracket is positioned with a device in factory and must not be adjusted.
• If bracket must be replaced, for example, when doing repairs after an accident, proceed as follows.
• Rear lid must be installed with gas-filled struts.
• Secure bracket - 3 - lightly with screw - 5 - on drive unit first.
• Bracket must still be moveable.
• Attach drive unit on rear lid hinge parallel to axle until it comes in contact with motor socket.
Drive unit socket must fit flat against hinge axle collar.
• Secure bracket on body side with screw - 4 - and tighten to 21 Nm.
• Tighten bolt - 5 - to 8 Nm.
• Tighten eccentric bolts with locking nuts to drive unit to 6 Nm.
• Upon tightening locking nuts, eccentric bolts are braced in hinge with no play.
• For this reason, you cannot counterhold eccentric bolt hex head with an open end wrench when tightening locking nuts.
• When removing drive unit, this tension is released with a small turn to the right on eccentric bolt hex head, after you have loosened locking nuts.
• Tighten screw - 7 - on drive fork to 12 Nm.
4 Combination screw
• 21 Nm
5 Combination screw
• 8 Nm
6 Lid hinge
7 Bolt
• Note the different tightening specifications.
• Screw is self-threading.
• Tightening specification for the self-tapping bolt that is installed in both fork halves: 12 Nm.
• Tightening specification for the self-tapping bolt that is installed in only one fork half: 8 Nm.
• Tighten to 12 Nm or 8 Nm.
8 Hinge arm
Install Drive Motor in Hinge
1 Rear lid drive motor
• When installing, insert sideways with socket - arrow B - and loose eccentric bolts - arrow A - in hinge.
• Drive unit socket must fit flat against hinge axle collar.
• That way, drive unit fork arm engages in hinge arm - 4 -.
• Tighten screw - 2 - to secure drive unit to bracket to 8 Nm
• Tighten locking nuts - 6 - to 6 Nm.
• Tighten the screw - 3 - to the tightening specification.
2 Combination screw
• 8 Nm
3 Bolt
• Self-threading
• Tightening specification for the self-tapping bolt that is installed in both fork halves: 12 Nm.
• Tightening specification for the self-tapping bolt that is installed in only one fork half: 8 Nm.
• Tighten to 12 Nm or 8 Nm.
4 Lid hinge
5 Hex head eccentric bolts
• Upon tightening locking nuts, eccentric bolts are braced in hinge with no play.
• For this reason, you cannot counterhold eccentric bolt hex head with an open end wrench when tightening locking nuts.
• When removing drive unit, this tension is released with a small turn to the right on eccentric bolt hex head, after you have loosened locking nuts.
6 Locking nut
• Before removing drive unit, loosen lock nuts on eccentric bolts.
• Release eccentric bolt tension in hinge arm by rotating hex head to right, if necessary.
• Self-locking
• 6 Nm
7 Cover
• Connected to locking nut.