Seat Belt Extender, Basic Function - GF91.45-P-2000A

Model All (CAR) with code U02 (Belt extender, electric) 

Model All (CAR) with code U02 (Belt feeder) 

Model All (CAR) with code U07 (Seat belt extender in rear passenger compartment) 

Overview 

This document contains information on:

• General information 
  • Seat belt feeder on convertible/coupe 
  • Seat belt extenders in rear passenger compartment 
• Function requirements 
• Function 
  • Seat belt feeder on convertible/coupe 
  • Seat belt extenders in rear passenger compartment 

General information 

Seat belt feeder on convertible/coupe 

In order to positively influence the seat belt behavior for the vehicle occupants on the front seats and to increase comfort, automatic seat belt feeders are provided. The design of the seat belt feeder means it can be inconspicuously integrated into its surroundings, and it is only available for the front seats in the convertible/coupe body form.

Seat belt extenders in rear passenger compartment 

In order to positively influence the seat belt behavior for the rear occupants and to increase comfort, the luxury individual seats in the rear passenger compartment (special equipment) are available with automatic seat belt feeders. Automatic seat belt feeders in the rear passenger compartment are additional special equipment for luxury individual seats in rear. The design of the two seat belt feeders enables inconspicuous integration in their surroundings.

Function requirements 

• CAN bus system in wake-up mode

Function 

Seat belt feeder on convertible/coupe 

The seat belt feeder is integrated into the side wall at the outer left and right behind the front seats. Depending on the version involved, the seat belt feeder is directly actuated by the rear door control unit or by the rear passenger compartment control unit. As soon as the vehicle occupant sits down on one of the front seats and the door has closed, the seat belt feeder automatically moves to position where it is easy to reach. The vehicle occupant can then fasten their seat belt quickly and easily. After the passengers have put on their seat belts, the seat belt feeder returns to its original position.

The seat belt feeder automatically returns to its original position:

• After the passengers have put on their seat belts.
• If the passengers have not put on their seat belts after a certain period of time.
• If the doors are opened again.
• After driving off.

Seat belt feeders can also be requested manually.

The seat belt feeder function can be deactivated or activated. From a certain speed limit while driving, the seat belt feeder is not active.

Seat belt extenders in rear passenger compartment 

The seat belt feeder is integrated in the rear shelf on the left and right outside behind the rear seat and is actuated directly by the rear seat control unit respectively. As soon as the rear passenger is sitting on one of the outside rear seats and the door has closed, the seat belt feeder automatically moves to a comfortable reach range. The rear passengers can fasten their seat belt quickly and easily. After the passengers have put on their seat belts, the seat belt feeder returns to its original position.

The seat belt feeder automatically returns to its original position:

• After the passengers have put on their seat belts.
• If the passengers have not put on their seat belts after a certain period of time.
• If the doors are opened again.
• After driving off.

Seat belt feeders can also be manually requested using the MBUX screens.

If the vehicle is equipped with MBUX Interior Assistant, the seat belt feeder extends as soon as the rear passenger grabs the seat belt tongue.

The automatic function of the seat belt feeders in the rear passenger compartment can be deactivated using the button in the driver's door for the child safety lock of the rear side windows. The function can also be deactivated or activated via a menu in the touchscreen of the head unit. From a certain speed limit while driving, the seat belt feeder is not active.

	Function schematics
	Function schematic for seat belt extender actuation	Model 223 with code U07 (Seat belt extender in rear passenger compartment)	PE91.45-P-2500-97A
	Component descriptions
	Belt extender, component description	Model 223 with code 223 (Electric backrest adjustment and head restraints) with code U07 (Seat belt extender in rear passenger compartment)	GF91.45-P-4000A
		Model 236	GF91.45-P-4000S
	Further basic functions
	Head unit/instrument cluster displays, basic function		GF54.30-P-2005A
	Rear door control unit, basic function		GF72.29-P-9892A
	Head unit control unit, basic function	Model all (CAR) with code 521 (Connect 20 Mid (NTG7)) with code U07 (Seat belt extender in rear passenger compartment) Model all (CAR) with code 534 (Connect 20 Premium (NTG7)) with code U07 (Seat belt extender in rear passenger compartment)	GF82.85-P-9891A
	Seat control unit, basic function	Model 223 with code U07 (Seat belt extender in rear passenger compartment)	GF91.29-P-9890A
	Seat belt buckle switch, basic function		GF91.60-P-2009A