Remove/Install Additional Battery - AR54.10-P-0007LF

Model 222 (except 222.077/176/177/178/179/187/188/980) 

except code B01 (48V technology) 

except code Z07 (B7 armoring on special protection version) 

Fig 1: Additional Battery Components Location - Model 222 (Except 222.077/176/177/178/179/187/188/980) Except Code B01, Z07 (Shown On Model 222 Up To Model Year 2018)

Courtesy of MERCEDES-BENZ USA

Shown On model 222 up to model year 2018 

	Risk of injury.  Moving parts can pinch, crush or, in extreme cases even sever extremities.	No parts of the body or limbs should be within the operating area of mechanical components when moving components.	AS00.00-Z-0009-01A
	Risk of fire  /risk of explosion due to short circuit and escaping oxyhydrogen gas. Risk of (burn) injury caused by caustic burns to eyes, skin and mucous membranes from battery electrolyte/mist, short circuit and arcing. Risk of poisoning  caused by swallowing battery electrolyte or absorption of lead through the skin or body orifices. Risk of death  due to voltage U >= 30 V AC and U >= 60 V DC.	No fires, sparks, open flames, or smoking. Wear acid-resistant gloves, clothing, and glasses. Pour battery acid only into suitable and appropriately marked containers.	AS54.10-Z-0001-01A
Topical note	Notes on battery		AH54.10-P-0001-01A
	Notes on HANDS-FREE ACCESS		AH80.61-P-0001-01A
	Remove/install
1	Switch off all electrical consumers	All electrical consumers must be switched off. Risk of damage to consumers when disconnecting/connecting the ground line (1).
2	Switch off ignition and store transmitter key outside of transmission range (min. 2 m)
3	Remove right trunk trim		AR68.30-P-4600LF
4	Unscrew nuts (2, 3)
5	Remove rear fuse and relay module (K40/5) from mounting (arrow) on battery box for auxiliary battery (4)	Guide rear fuse and relay module (K40/5) carefully out of the support (arrow). Otherwise the catch hook that locks the housing of the rear fuse and relay module (K40/5) in the support (arrow) may break. Tilt rear fuse and relay module (K40/5) upwards to the rear and downwards to the front, and remove with upward swivel movement.
6	Remove DC/DC converter control unit for windshield heater	Model 222 (except 222.077/176/177/178/179/187/188/980) with code 597 (Heated windshield) except code B01 (48V technology) except code Z07 (B7 armoring on special protection version)	AR54.21-P-1603LF
7	Detach vent hose (5) from elbow fitting (6)	Ensure that vent hose (5) is seated and routed correctly. Battery acid vapors emitted will otherwise damage surrounding components.
8	Release shackle (7) and slide battery box for auxiliary battery (4) rearwards out of the mounting for the battery box (8)	Slide battery box for auxiliary battery (4) as far back as possible out of the mounting for the battery box (8) until the cover for the battery box (9) can be removed.
9	Remove cover of battery box (9) from battery box of additional battery (4)
10	Unscrew screw/bolt (10) and disconnect ground line (1) at ECO start/stop function additional battery (G1/13)	Bolt (10) remains on ground line (1). Bolt, charging cable to battery terminal of additional battery	*BA54.10-P-1004-01J
11	Use a diode test lamp to check the on-board electrical system for voltage between the positive line (11) and a suitable ground point	Cover up positive line (11). Otherwise a short circuit may occur. If voltage is present, the on-board electrical system is still active due to a fault. Danger of damage due to short circuit. If the on-board electrical system is still active: ↓ Detach ground line of on-board electrical system battery. Rectify fault in on-board electrical system.	AR54.10-P-0003LF
12	Remove screw/bolt (12) and detach positive line (11)	Bolt (12) remains on positive line (11). Bolt, charging cable to battery terminal of additional battery	*BA54.10-P-1004-01J
13	Take battery box for additional battery (4) with ECO start/stop function additional battery (G1/13) out of trunk
14	Take ECO start/stop function additional battery (G1/13) out of battery box for additional battery (4)	When replacing the auxiliary battery for the ECO start/stop function (G1/13).
15	Install in the reverse order