Gauging coupling lock (without removing/refitting roof module) (M4 Convertible)

Special tools required:

54 0 190
54 0 180
54 0 130
2 360 046
54 0 131
54 0 132
00 9 461
00 9 450

IMPORTANT: To prevent damaging the coupling lock gauge, set the coupling lock gauge down only in the transportation crate or on the cross member.

The coupling lock gauge is a highly sensitive measuring instrument which reacts even to light impacts with distortion.

The coupling lock gauge must be checked for dimensional accuracy on a master gauge after being subjected to impact or dropped.

Necessary preliminary tasks:

Roof module must be installed
Connect BATTERY CHARGER .
Remove AIR VENT ORNAMENTAL GRILLE .
Remove left/right WEATHER STRIP .
Remove left/right SIDE TRIM PANEL UPPER SECTIONS

NOTE: Close soft top (roof module deployed).

Release left and right screws (1).

Slacken lock nuts with special tool 54 0 190.

Unscrew barrel screws using special tool 54 0 180.

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NOTE: Lower soft-top (roof module parked).

IMPORTANT: Risk of damage when positioning gauge for coupling lock and installation work.

Tape off corners (1) of roof shell 1 and 3.

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Remove left and right facings (1).

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Release left and right screws (1).

Remove left and right holders (2).

Release left and right screws (3).

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Slacken lock nuts (1) using special tool 54 0 190.

Unscrew barrel screws using special tool 54 0 180.

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Undo screws (1) on left and right coupling lock.

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NOTE: Basic setting of coupling lock must be ensured.

For purposes of clarity, washers (1 and 2) are pulled out.

Only one washer (1 and 2) per side may be fitted.

Washer (1) = 0.5 mm

Washer (2) = 1 mm

Before remounting the washers, mark the position of the lock (4).

Slacken screw (3) and fit corresponding washers (1 and 2).

Tighten screw (3).

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Align BASIC GAUGE .

Preparing special tool:

Special tool 54 0 130 must be equipped with correct special tool (1).

Special tool (1) without labelling only matches E93.

Special tool (1) with labelling "2 360 046 A" only matches F33/F83.

Remount SPECIAL TOOL (1) as necessary.

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NOTE: Coupling lock may not be screwed for adjustment work (barrel screws move freely).

Insert special tool 54 0 130 in coupling lock (1).

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Screw coupling lock gauge 54 0 131 left and 54 0 132 right to basic gauge with special tool 00 9 461.

Tightening torque 6 Nm

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Position L-piece (1) under stop screw (2) of coupling lock.

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Screw guide pin (1) into coupling lock (2).

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Make sure special tool is in correct position:

Stop screw (1) to limit position (2)
L-piece (4) to stop screw (1)

Tighten screw (3) for L-piece (4).

Stop screw (1) must not be adjusted.

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Installation note:

Observe screwing sequence of coupling lock:

Z-direction (coupling lock to screwing plate, rollover protection system)
Y-direction (coupling lock to side panel)
X-direction (roof frame to partition wall)

Tightening torque 54 37 22AZ .

Bring barrel screws (1) into contact with special tool 54 0 180 in conjunction with 00 9 450.

Tightening torque 54 37 22AZ .

Tighten lock nuts (2) with special tool 54 0 190.

Tightening torque 54 37 24AZ .

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Tighten screws (1) on left and right coupling locks.

Tightening torque 54 37 13AZ .

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NOTE: When tightening the screw (2), make sure the bush (1) rotates out until it is contacting on the coupling lock (3).

Tighten screw (2).

Tightening torque 54 37 12AZ .

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Removing special tool:

Unscrew guide pin (2) from coupling lock (2).

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Feed out L-piece (1) under stop screw (2) of coupling lock.

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Dismount coupling lock gauge 54 0 131 left and 54 0 132 right from basic gauge and remove.

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Remove BASIC GAUGE .

Insert left and right holders (2).

Tighten screws (1) on left and right.

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Insert left and right facings (1).

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Move roof module into following intermediate station.

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Installation note:

Tighten barrel screws with special tool 54 0 180 in conjunction with 00 9 450.

Tightening torque 54 37 22AZ .

Tighten lock nuts with special tool 54 0 190.

Tightening torque 54 37 24AZ .

Tighten screws (1) on left and right.

Tightening torque 54 37 13AZ .

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