I have a W220 with a seat belt that will not retract while the passenger is buckled up. (if it is pulled forward, it does not retract)
If unbuckled, it will retract instantly! Or if the ignition is switched off it will also retract correctly while still buckled up.
Is there an easy fix for this? Is it a re-programme issue? Or is it a complete replacement of belt and electrics? (as suggested by stealership at a cost $800+)