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72 11... Check list for automatic seat belt

Was the automatic seat belt with lower strap replaced after an accident, e.g. frontal and/or oblique collision in which the impact absorbers/deformation elements were permanently deformed? 
(only while seat belt was fastened) 
No  Replace complete automatic seat belt 
The following must also be checked and replaced, if necessary: 
seatbelt mounts on the vehicle body 
seatbelt mounts on the seat rails  .
Yes    
Does seat belt lock when pulled out suddenly? No Replace automatic seat belt (upper seat belt).
Does the automatic reel eliminate the belt slack? No Replace automatic seat belt (upper seat belt).
Yes    
Yes    
Can the seat belt strap be pulled out without jamming? No Automatic reel is loose - tighten reel.
If fault persists:
Return spring broken - replace automatic seat belt (upper seat belt).
Yes    
Does the strap on the front seat belts retract automatically?
Does the strap on the rear seat belts retract automatically,
a small remaining loop is acceptable
if this remaining loop is fully retracted when the seat belt strap is readjusted.
No Automatic reel is loose - tighten reel.
Excessive friction in belt guides - replace automatic seat belt (upper strap).
Return spring broken - replace automatic seat belt (upper seat belt).
Yes    
Does automatic reel make a squeaking noise when belt is fastened or unfastened? Yes Excessive friction in belt guides - replace automatic seat belt (upper strap).
Automatic reel is loose - tighten reel.
Return spring broken - replace automatic seat belt (upper seat belt).
No    
Is the plastic casing on the belt tongue free from damage in the area of the belt opening?  No  Replace complete automatic seat belt 
Yes    
Is the fully extended seat belt strap free from
pinches,
burn marks,
tears and cuts,
creasing and
unraveling?
No Replace complete automatic seat belt
Yes    
When the seat belt is fastened, is the belt tongue ejected by spring pressure from the buckle when the "red button" is pressed? No Replace complete automatic seat belt
Yes    
Does fastened seat belt lock during emergency braking on a dry roadway at double walking speed? No Replace complete automatic seat belt
Yes    
Is fully pulled-out seat belt strap free of serious dirt and other marks? No If dirt and marks cannot be removed with commercially available mild detergent, the automatic seat belt (upper seat belt) must be replaced.
Yes    
In the case of seat-integrated seat belts, is front tongue of reclining mechanism or seat rail free of deformation? No Replace both damaged parts and complete automatic-reel seat belt.
The following must also be checked and replaced, if necessary:
seatbelt mounts on the vehicle body
seatbelt mounts on the seat
seat rails.
Yes    
The automatic seat belt is OK!