Front emergency tensioning retractor, location - GF91.40-P-4000-01A
WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.
Models 140, 170, 202, 208, 210
Illustrated on model 202
The emergency tensioning retractors (for driver and front seat passenger) are located at the bottom of the B-pillar behind the plastic covering.
Emergency tensioning retractor (front right)