Remove/Install Engine Compartment Fire Extinguishing System Temperature Sensor - AR86.10-P-0127SG

Model 223 

with code Z07 (B7 armoring on special protection version) 

with code Z21 (Fire extinguishing system) 

Fig 1: Engine Compartment 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	Take electrical fuse 5, special-purpose vehicles (F80/1f5) and electrical fuse 7, special-purpose vehicles (F80/1f7) out of 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 the DWD (Dynamic Wiring Diagram). https://ws-retailfactory-dyna.mercedes-benz.com/start-aspu/
4	Release locks and remove trim (1).
5	Cut cable tie (4).
6	Disconnect electrical connectors (5).
7	Remove screw/bolt (2).
8	Remove the bracket (3).
9	Remove fire-extinguishing system temperature sensors (B65/3, B65/4).
10	Install in the reverse order.
	Check
11	Perform self-test for fire-extinguishing system.		AR86.10-P-0101-01SG