This video describes the process of removing the seat belt on an SL model vehicle. The viewer is instructed to first remove the side cladding by opening the Vario roof and moving the seats forward, then carefully removing the safety belt upwards. The door sill strip is also removed by hand, using a wedge to unclip the lower covering and remove the top covering, and removing four screws that attach the side cladding. On the driver's side, the cladding is only attached with two screws instead of four. The process of refitting the parts is also mentioned.
This video would likely be useful for individuals who own an SL model vehicle and need to remove or replace the seat belt.