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| Completely unreel the seat belt from the inertia reel or from the lap belt adjusting strip. |
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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. |
| If there is damage, replace seat belt and 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). |
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| Draw the seat belt out of the inertia reel with a sudden sharp pull. |
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| If locking mechanism does not work - 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). |
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| Accelerate to 20 km/h and perform a full brake with the brake pedal. |
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| If the locking mechanism does not lock the belt when the brakes are applied, replace the seat belt and buckle with a new original part. |
WARNING | For safety reasons, carry out this test on a section of road with no traffic so as not to endanger other road users. |
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| Seat belt buckle - visual inspection |
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| Check belt buckle for fractures and flaking. |
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| If there is damage, replace seat belt and 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. |
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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. |
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| 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 new original parts. |
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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