Retrofit Audio 50 APS navigation system - AN82.61-P-0004TX

MODEL 219.322/356/357/372/375 1# up to 2.3.08 except CODE (494) USA version except CODE (498) Japan version except AMG vehicles 

Fig 1: Identifying Radio Control Panel And Navigation Unit

Courtesy of MERCEDES-BENZ USA

The fiber optic cable connector (MOST) (X39/50) is located in the rear cable duct, left of to the rear bench seat. It always has to be checked, whether is exists, since there are also vehicles with several or no fiber optic cable connectors (MOST).

Fig 2: Identifying Fiber Optic Cable Connector

Courtesy of MERCEDES-BENZ USA

	Remove
	Risk of explosion  caused by escaping oxyhydrogen gas. Risk of injury  caused by caustic burns to eyes, skin and mucous membranes from battery electrolyte (contains diluted sulfuric acid) or metal spatter due to short circuit. Risk of burn injuries  caused by short circuit. Risk of poisoning  caused by swallowing battery electrolyte (contains diluted sulfuric acid) or absorption of lead over the skin or orifices	No fire, sparks, open flames or smoking. Wear acid-resistant gloves and clothing and safety glasses with side guards. Do not place any conductive objects on the battery and avoid any short circuit from battery positive to ground. Only fill liquid battery electrolyte (diluted sulfuric acid) into suitable and appropriately marked containers.	AS54.10-Z-0001-01A
1	Disconnect battery ground line
			AR54.10-P-0003TX
	Notes on battery		AH54.10-P-0001-01A
2	Remove side paneling in left side of luggage compartment
			AR68.30-P-4800TX
3	Remove SAM control unit with fuse and relay box in luggage compartment	Do not disconnect electrical connectors.
4	Remove side upholstery of left rear seat backrest
5	Remove paneling on left B-pillar	Only loosen in the lower area until the cable duct is accessible.
			AR68.30-P-4700TX
6	Remove front floor covering (left)
7	Open left wiring ducts
8	Remove radio	Audio 20 CD radio can be dispensed with and is replaced with the Audio 50 APS radio with navigation unit.
9.1	Remove instrument cluster	Vehicles without  code (596) Heat- insulating glass.
	Install
10.1	Retrofit antenna for global positioning system (GPS)	Vehicles without  code (596) Heat- insulating glass.	AN82.61-P-7474-04TXA
11	Retrofit wiring harness.		AN82.61-P-0001-01TX
12	Retrofitting AM/FM antenna line		AN82.62-P-0001-04TX
13	Retrofit MOST fiber optic cable wiring harness	Risk of breakage!  Do not kink fiber optic cable and do not route over sharp edges or bend in radii smaller than 25 mm. Tensile forces on inserts must not exceed 65 N. Do not squeeze fiber optic cable and do not compress with clamps or cable ties.
		Vehicles without  one of the following codes: Code (386) Preinstallation for telephone "Handy", UPCI system, Code (388) Telephone "Handy", UPCI system. Code (819) CD changer.	AN82.61-P-0001-06TXA
		Vehicles without a fiber optic cable connector (MOST) (X39/50) (see figure).	AN82.61-P-0001-06TXB
		Vehicles with a fiber optic cable connector (MOST) (X39/50) (see figure).	AN82.61-P-0001-06TXC
14.1	Retrofit antenna for global positioning system (GPS)	Vehicles with  code (596) Heat-insulating glass. For installation refer to: ↓
		Remove/install antenna MODEL 219.3 up to 31.5.06 with CODE (521) MB Audio 50 radio USA (without navigation) with CODE (525) MB Audio 50 APS radio with CODE (526) COMAND (without navigation system) with CODE (527) COMAND APS (with navigation system) with CODE (528) HIGH Class USA with CODE (529) HIGH Class Japan with CODE (530) COMAND APS USA (with navigation system).	AR82.70-P-8951TX
15	Retrofit audio gateway control unit		AN82.61-P-0001-07TX
16	Perform retrofit variant coding	Enter navigation parameters and reconfigure MOST ring.
17	Install in the reverse sequence	Steps 9.1 to 1.
18	Enter special equipment in the vehicle data card and in the vehicle's online data card	Code (525) MB Audio 50 APS radio.