Remove/Install Emergency Fresh-Air System Gas Sensor - AR86.10-P-0156SG

Model 223 

with code Z07 (B7 armoring on special protection version) 

with code Z25 (Emergency fresh-air system) 

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 store transmitter key outside of transmission range (min. 2 m).
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 air duct segment.
			AP83.00-P-8381I
5	Disconnect electrical connector and expose electric line (1).
6	Remove screws (2).
7	Remove irritant gas sensor (B30).	Prevent pinching or kinks when routing electrical wiring harness of irritant gas sensor (B30). Otherwise the electrical sub-harness can be damaged.
8	Install in the reverse order.