Remove/Install Rear Fire Extinguishing System Temperature Sensor - AR86.10-P-0125SG

Model 223 

with code Z07 (B7 armoring on special protection version) 

with code Z21 (Fire extinguishing system) 

Courtesy of MERCEDES-BENZ USA

Fig 1: Rear Fire Extinguishing System Temperature Sensor Components Location - Model 223 With Code Z07, Z21

Courtesy of MERCEDES-BENZ USA

Notice	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove/install
1	Remove rear panel trim.		AR68.30-P-4750SG
2	Remove electrical fuse 5, special-purpose vehicles (F80/1f5), and electrical fuse 7, special-purpose vehicles (F80/1f7) from special-purpose vehicle fuse block (F80/1).	Special-purpose vehicle fuse block (F80/1) is located at top right in trunk, behind rear panel trim. This prevents the fire-extinguishing system from being triggered by mistake. The wiring diagram documentation for this model series can be found in DWD (Dynamic Wiring Diagram). https://ws-retailfactory-dyna.mercedes-benz.com/start-aspu/
3	Remove rear axle.		AR35.10-P-0010S
4	Lower vehicle.
5	Unclip electrical connectors (2) and disconnect.	Clip remover	Fig 2
6	Press grommets (3) through body and pull electrical wiring harnesses (1) downward through opening.
7	Raise vehicle.
8	Expose electrical wiring harnesses (1) up to fire-extinguishing system temperature sensors (B65/7, B65/8).
9	Unscrew screw (5) and remove holder (4).
10	Guide fire-extinguishing system temperature sensors (B65/7, B65/8) out of holder.
11	Install in the reverse order.
	Check
12	Perform self-test for fire-extinguishing system.		AR86.10-P-0101-01SG

Fig 2: Identifying Clip Remover (452 589 01 63 00)

Courtesy of MERCEDES-BENZ USA