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.
Diagram not available
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.
Diagram not available
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.
Diagram not available
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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