Remove/Install Front Fire Extinguishing System Temperature Sensor - AR86.10-P-0126SG

Model 223 

with code Z07 (B7 armoring on special protection version) 

with code Z21 (Fire extinguishing system) 

Fig 1: Front 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	Switch off ignition and remove transmitter key.
2	Remove rear panel trim.		AR68.30-P-4750SG
3	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/
4	Remove lower front side engine compartment lining.		AR61.20-P-1105S
5	Remove screw (4) and remove fire-extinguishing system temperature sensors (B65/5, B65/6) from brackets (1).
6	Slightly press wheel well lining (3) to one side until electrical connectors (2) are accessible.
7	Expose electrical connectors (2) and disconnect.
8	Remove fire-extinguishing system temperature sensors (B65/5, B65/6).
9	Install in the reverse order.
	Check
10	Perform self-test for fire-extinguishing system.		AR86.10-P-0101-01SG