I have purchased 2 seatbelts for my 1984 W126 (non ETR type). They are wound up in the reel and I can not get them to unwind. Is there a trick to this? If you order a new one does it come pulled out?

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1993 Mercedes Benz 300D 2.5 205K (ex wife's)
1984 Mercedes Benz 300SD 320K (SOLD)
2004 Mercedes Benz C240 75K
1995 GMC Sierra 2WD 5.7L 188K
1983 Mercedes Benz 300SD 239K (SOLD)
1987 BMW 325i 220K (SOLD FOR SALVAGE)

609 Certification

The reel usually has some type of "inertia" lock that prevents the belts from extending when the vehicle is slowing down. Is it possible that this device is engaged?

the inertia reel is very sensitive to position, you pretty much have to have the reels in the exact position (horizontal/vertical) that they would be in when mounted to the vehicle. Try bolting one up ..I bet it will work then.

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00' C230K
88' 190E 2.3
79' 280CE (Sold)
84' 300SD
73' 450SE
93' 300E
68' VW Bug (what the hell was I thinking!)
99' HD FLSTF