Please note: For repair and maintenance work involving intervention in the passive safety system, Daimler-Chrysler recommends that you contact one of the Mercedes-Benz service stations, as Mercedes-Benz CTOA specialists have the relevant professional knowledge and all the tools at their disposal to perform all the necessary work.
Unqualified personnel are prohibited from performing service work, especially if this work may affect safety, and from performing work on safety-related systems.
Figure 16
1. Adjusting the height of the seat belt
2. Tongue
3. Belt lock
4. Release key
Adjusting the height of the upper seat belt anchor point
(Article borrowed from the web portal: MercedesMan)
Figure 17
Press the release button (1) and slide the seat belt height adjuster up or down.