Remove/install emergency tensioning retractor - AR91.40-P-1011MCU

MODEL 451.3/4 as of 31.8.10 

Belt anchor fitting tensioner on driver-side 

Fig 1: Identifying Emergency Tensioning Retractor Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of injury  caused by performing testing or repair work on airbag or emergency tensioning retractor units.	Store airbag units with deployment side facing up; do not expose to temperatures greater than 100 °C. When working on these units, disconnect the power supply.	AS91.00-Z-0001-01A
	Notes on avoiding damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Notes on performing repair, body work and welding on vehicles with airbags and ETR units		AH91.00-P-0002-01SM
	Legal requirements on handling and storing airbags and emergency tensioning retractor units		AH91.00-P-0004-01A
	Risk of injury  caused by backrest suddenly folding forward if release lever is accidentally operated during inspection and repair work	When working on the seat, be careful not to accidentally release the backrest mechanism allowing the seat to fold forward. Keep body parts clear of the backrest travel area.	AS91.00-Z-0005-01V
1	Move seat to front-most position and fold toward front
2	Turn lock (arrow) in lock (3) of seat belt (4) through 90° clockwise and detach seat belt (4) from belt anchor fitting tensioner (1)	Check lock (3) is correctly seated in mounting (2) and check for correct installation position of the seat belt (4).
3	Unclip and remove cover (5)
4	Detach driver anchor fitting tensioner connector (R12/37x1) from driver anchor fitting tensioner squib (R12/37)
5	Remove bolt (6) and remove belt anchor fitting tensioner (1)	Check belt anchor fitting tensioner (1) is correctly seated in body cutout. If the belt anchor fitting tensioner (1) is replaced, the defective belt anchor fitting tensioner (1) has to be disposed of correctly. See: ↓	*BA91.40-P-1005-01G
	Notes on disposing of airbag and emergency tensioning retractor units		OS91.00-P-0001-01A
6	Install in the reverse order
7	Check supplemental restraint system using STAR DIAGNOSIS	When replacing the belt anchor fitting tensioner (1).	AD00.00-P-2000-04MCC