Remove/install interior compartment prefuse box - AR54.15-P-1350RT

MODEL 251

Fig 1: Identifying Interior Compartment Pre-Fuse Box Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
	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
	Notes on battery	All models	AH54.10-P-0001-01A
	Notes on AGM battery		AH54.10-P-0002-01A
1	Disconnect ground line, expose battery	Refer to: ↓
1	Disconnect ground line, expose battery	Remove/install battery	AR54.10-P-0005RT
2	Undo nut (3), remove clamping device	Tightening torque is embossed on the battery compartment prefuse box (F33).
3	Detach plug of maxi fuses (4)	Note plug's color coding. When replacing the battery compartment prefuse box (F33) change the maxi fuses (4).
4	Unclip battery compartment prefuse box (F33) (arrow A)	Carefully unclip battery compartment prefuse box (F33). If the clip is bent too far it may break.
5	Unlock locking devices (arrows B) using a suitable tool and detach fuse carrier with fuses (2) from battery compartment prefuse box (F33)	The number of fuses may vary depending on the vehicle model and equipment.
6	Undo nuts (1), detach electrical connections	The electrical connections must be clearly assigned to the corresponding contact of the battery compartment prefuse box (F33) before being detached. Otherwise during installation mixups may occur which could ultimately induce faults in the vehicle electrical system. Tightening torque is embossed on the battery compartment prefuse box (F33). The number of electrical connections may vary depending on the vehicle model and equipment.
7	Remove battery compartment prefuse box (F33)
8	Install in the reverse order
9	Perform basic programming		AR00.19-P-0200RT