51 24 004 Adjusting Rear Lid Lock (Lower Section of Rear Lid Lock)

WARNING: This page is about a different car, the 2005 BMW 760i. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Rear lid must be correctly adjusted before adjustment of Soft Close Automatic.

If necessary adjust rear lid to fit . See 41 62 014 ADJUSTING REAR LID

For ideal adjustment, refer to BODY GAP DIMENSIONS . .

IMPORTANT:

Once plug connection to servomotor has been disconnected, rear lid can only be opened with central key (1).

Button (2) then does not function.

Insert central key (1) in lock cylinder.

Fig 1: Identifying Central Key & Button

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NOTE: This illustration displays the side view of the eccentric pin in the lower section of the trunk lid lock.

Top dead center
Rear lid lock upper section unlocked
Bottom dead center
Rear lid lock upper section locked

Fig 2: Locating Rear Lid Lock Upper Section
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Lock rear lid lock upper section with a screwdriver.

Eccentric pin of rear lid lock lower section must now be at bottom dead centre.

Fig 3: Identifying Eccentric Pin Of Rear Lid Lock

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Open flap in luggage compartment panel on right. See 51 47 172 REMOVING AND INSTALLING/REPLACING FLAP IN LUGGAGE COMPARTMENT TRIM, LEFT OR RIGHT

Unfasten plug connection (1) and disconnect.

The eccentric pin now remains at bottom dead center even after the rear lid lock upper section has been unlocked.

Fig 4: Identifying Plug Connection

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Turn central key in lock cylinder to right, thereby unlocking rear lid lock upper section.

Rear lid lock upper section locked
Rear lid lock upper section unlocked

IMPORTANT: Rear lid lock upper section must be unlocked before each closing of rear lid (risk of damage).

Fig 5: Identifying Rear Lid Lock Upper Section Locked

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Adjustment of Soft Close Automatic:

Check fulcrum pads on lower section of rear lid lock for damage and replace if necessary.
Close rear lid.
Check height of rear lid to side panels.

For ideal adjustment, refer to BODY GAP DIMENSIONS , adjust if necessary.

Fig 6: Locating Fulcrum Pads On Lower Section

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Open rear lid.

Screw in rubber buffers (1) on left/right completely.

Fig 7: Identifying Rubber Buffers

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Lever out caps (1) from trim (2).

Fig 8: Identifying Lever Out Caps From Trim

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Height adjustment of trunk lid:

NOTE: For purposes of clarity, shown here without trim for "tail panel at top".

Slacken screws (1 to 3)
Move rear lid lock lower section fully upwards
Tighten down screws (1 to 3) again
Close rear lid
Measure and note down gap dimensions
Open rear lid
Slacken screws (1 to 3) and lower rear lid lock lower section by difference from desired dimensions
Tighten down screws (1 to 3)
Check adjustment and repeat if necessary
Note down adjusted gap dimensions

Tightening torque 51 24 6AZ . See 51 24 REAR LID LOCKS

Fig 9: Identifying Slacken Screws

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Contact pattern test:

Coat rear lid lock upper section with grease.

Rear lid lock upper section must not brush against lower section.
Eccentric pin of rear lid lock lower section must not brush against upper section.
Contact pattern of rear lid lock upper section on eccentric pin should be central (settling behavior of rear lid is compensated).

Fig 10: Identifying Eccentric Pin Of Rear Lid Lock Lower Section
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IMPORTANT: Observe screw length, use longer screws if necessary.

Correcting contact pattern:

Correction is performed by fitting or removing shims underneath screws (1 to 3).

Remove trim for tail panel at top
Release screws (1 to 3)
Tilt rear lid lock lower section forwards
Carry out correction
Check contact pattern again, repeat adjustment if necessary

Tightening torque 51 24 6AZ . See 51 24 REAR LID LOCKS

Fig 11: Identifying Slacken Screws

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Open rear lid.

Turn rubber buffers (1) until closed rear lid rests on buffers (1) on left/right.

IMPORTANT: Rear lid must not be higher than set gap dimensions as otherwise there will be a distortion of height adjustment!

Re-establish plug connection for rear lid lock lower section.

Fig 12: Identifying Rubber Buffers

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Remove central key (1) from lock cylinder.

Press button (2).

Eccentric pin of rear lid lock lower section turns to top dead center.

Close rear lid and check function of Soft Close Automatic, repeat if necessary.

Add final details to vehicle.

Fig 13: Identifying Central Key & Button

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