Retrofit Alcohol Breathalyzer - AZ54.21-P-0011S

Model 223 

as of model year 2023 

Courtesy of MERCEDES-BENZ USA

Alcohol breathalyzer installation areas 

Notice	Notes on retrofitting electrical/optical lines		AH82.00-P-0000-01A
	Notes on retrofitting an alcohol breathalyzer		AH54.21-P-0001-08A
	Remove
1	Expose rear signal acquisition and actuation module control unit (N10/8).
			AR54.21-P-1269S
	Cab signal acquisition and actuation module control unit (SCA), component description		GF54.21-P-0007A
2	Expose fuse and relay module (F152/1).
			AR54.15-P-0003S
	12 V on-board electrical system fuse and relay module, component description		GF54.15-P-0006A
3.1	Expose left front footwell ground point (W85/1).	Model 223.### 1# For location of the left front footwell ground point (W85/1), see Dynamic Wiring Diagram (DWD). https://xentry.mercedes-benz.com/home/
3.2	Expose right front footwell ground point (W85/2).	Model 223.### 2# For location of the right front footwell ground point (W85/2), see Dynamic Wiring Diagram (DWD). https://xentry.mercedes-benz.com/home/
	Install
4	Retrofit alcohol breathalyzer.	Observe installation documentation from manufacturer of alcohol breathalyzer. For wiring diagrams, see Dynamic Wiring Diagram (DWD). https://xentry.mercedes-benz.com/home/  Electrical connection of alcohol breathalyzer: Left front footwell ground point (W85/1) or right front footwell ground point (W85/2) with line connector A 002 546 74 40 to existing line, on fuse and relay module (F152/1) in fuse F205 with contact A 013 545 75 26 and fuse 10 A and on rear signal acquisition and actuation module control unit (N10/8) in plug RB3, pin 28 with contact A 005 545 75 26.
5	Install remaining parts.
	Update Vehicle Documentation (VeDoc)
6	Attach "Alcohol breathalyzer retrofitted as per AZ54.21-P-0011S" note under field organization texts for DG 54.
	Initial startup
7	Connect diagnostic system.
			AD00.00-P-2000-06FR
8	Activate alcohol breathalyzer.	In the EIS [EZS] control unit  menu: Adaptation → Configuration → Manual setting
9	Disconnect diagnostic system.
			AD00.00-P-2000-06FR
10	Carry out operational check.