Raising/lowering rear head restraints, function - GF91.16-P-2001S

MODEL 215 

MODEL 220 with CODE (223b) Electrically adjustable rear bench seat 

MODEL 220 with CODE (224c) Electrically adjustable rear bucket seats, with seat ventilation, seat heater and memory package 

Fig 1: Identifying Raising/Lowering Rear Head Restraints Components Function

Function prerequisites: 

• C.15 ON
• Voltage not too low or too high

Putting up rear head restraints, function (via seatbelt buckle check)  (special equipment) The automatic set-up feature for the left/right rear head restraints serves for the safety and convenience of the affected rear seat passengers wearing seatbelts. 

This function is accomplished pneumatically via vacuum control. The rear SAM control module (N10/8)  reads in the switching status of the left rear seatbelt buckle and seatbelt wear convenience switch (S68/11)/right rear seatbelt buckle and seatbelt wear convenience switch (S68/12)  and thereby recognizes whether the belt tongue on the affected seatbelt is inserted into the belt buckle. If so it sends a message via the CAN bus to the PSE control module (combined) (A37):  "Left/right rear seatbelt buckled". This module then actuates the left head restraint up valve (Y24/4)/ right head restraint up valve (Y24/5).  The left/right head restraint is put up.

The head restraint in the center must be put up manually if required.