Completely unreel the seat belt from the inertia reel or from the lap belt adjusting strip.
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Check seat belt for:
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Soiling, if necessary wash with a mild detergent.
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Torn fraying on the edge of the belt.
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Cuts, tears or chafing spots.
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Cigarette burn stains or holes etc.
In the event of damage - replace seat belt together with buckle with a new original part.
Check inertia reel - locking mechanism:
The inertia reel has two locking functions.
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The first locking function is activated when the belt is drawn rapidly out of the inertia reel (belt withdrawal acceleration).
Inspection:
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Draw the seat belt out of the inertia reel with a sudden sharp pull.
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No locking effect - replace seat belt together with buckle with a new original part.
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First check whether the belt feeds out and retracts smoothly, and whether the position of the inertia reel has changed.
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The second locking function is activated by a change in the vehicle's motion (vehicle-dependent locking function).
Inspection:
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Put on seat belt.
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Accelerate to 20 km/h and perform a full brake with the brake pedal.
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Replace the seat belt and buckle with a new original part if the locking device does not lock the belt during braking.
WARNING
For safety reasons, carry out this test on a section of road with no traffic so as not to endanger other road users.
Seat belt buckle - visual inspection:
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Check belt buckle for fractures and flaking.
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In the event of damage - replace seat belt together with buckle with a new original part.
Seat belt buckle - functional check:
Checking seat belt buckle:
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Insert buckle latch in the belt buckle until there is an audible click. Check whether the locking mechanism engages, by tugging forcefully on the seat belt.
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If the buckle latch fails to lock into the buckle even once out of at least five tests, replace the seat belt and buckle with a new orginal part.
Check buckle release:
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Release seat belt by pressing the seat belt buckle button.
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If the belt is loose, the latch must eject independently from the belt buckle.
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Test at least 5 times. If the buckle latch fails to eject even once, replace the seat belt and buckle with a new original part.
WARNING
Never use lubricants to make seat buckle buttons quieter or easier to operate.
Checking deflection fittings and buckle latches:
When the belt system is burdened (seat belt attached in an accident) plastic-coated fittings will display fine parallel score marks. Normal wear and tear due to frequent use is recognisable by smooth, even wear, without scoring.
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Check the plastic for deformation, flaking and cracking.
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In the event of scoring and/or damage replace seat belt and buckle with a new original part.
Checking fixingings and fixing points:
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Buckle flange deformed (stretched)
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Height adjuster does not work.
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Fixing points (seat, pillar, vehicle floor) warped, or thread damaged.
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If the parts are damaged replace seat belt and buckle with a new original part.
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Replace fixing points with a new original part.
Note
If there is damage not due to an accident, for example normal wear and tear, it is only necessary to replace the part concerned with a new original part.
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