Remove/install additional battery relay - AR54.15-P-2000EW

MODEL 207, 212 with CODE B03 (ECO start/stop function)

MODEL 212 with CODE ME04 (Mild hybrid drive)

MODEL 218 with CODE B03 (ECO start/stop function) without CODE 4U7 (Start/stop voltage dip protector)

Fig 1: Identifying Battery Relay Remove/Install Components - Model 212 With Code B03

Courtesy of MERCEDES-BENZ USA

MODEL 212 with CODE B03 (ECO start/stop function) and CODE 411 (6-speed manual transmission), shown on MODEL 212.0

MODEL 212.0/2 with CODE B03 (ECO start/stop function) and CODE U42 (BlueTEC diesel exhaust treatment (SCR)) and CODE 411 (6-speed manual transmission), MODEL 212.0/2 with CODE B03 (ECO start/stop function) and CODE 421 (9G-TRONIC) or CODE 427 (7G-TRONIC), MODEL 212 with CODE ME04 (Mild hybrid drive), MODEL 218, shown on MODEL 218.3

Fig 2: Identifying Battery Relay Remove/Install Components - Model 212.0/2 With Code B03

Courtesy of MERCEDES-BENZ USA

	Risk of injury caused by fingers being jammed or pinched when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof.	No parts of the body or limbs should be within the operating area when the components are moving.	AS00.00-Z-0011-01A
	Notes on sensor system for trunk lid opening/closing		AH80.61-P-0001-01A
	Remove/install
1	Detach ground line of on-board electrical system battery		AR54.10-P-0003EW
2	Detach ground line from additional battery for ECO start/stop function (G113)	MODEL 207 with CODE B03 (ECO start/stop function)	AR54.10-P-0007EC
2		MODEL 212 with CODE B03 (ECO start/stop function) MODEL 212 with CODE ME04 (Mild hybrid drive) MODEL 218 with CODE B03 (ECO start/stop function) without CODE 4U7 (Start/stop voltage dip protector)	AR54.10-P-0007ES
3	Unlock catch hook (3) and open cover (4)	MODEL 212 with CODE 411 (6-speed manual transmission) with CODE B03 (ECO start/stop function)
4	Remove relay for additional battery of ECO start/stop function (K114) from foam material	MODEL 212 with CODE 411 (6-speed manual transmission) with CODE B03 (ECO start/stop function)
5	Unscrew nut (5) and remove electrical line (6)	Nut (5) remains on electrical line (6).
6.1	Unscrew nuts (7) and detach electrical line (8)	MODEL 212 with CODE 411 (6-speed manual transmission) with CODE B03 (ECO start/stop function) Nut (7) remains on electrical line (8).
6.2	Unscrew nut (7) and detach electrical lines (8, 9)	MODEL 212.0/2 with CODE 411 (6-speed manual transmission) with CODE B03 (ECO start/stop function) with CODE U42 (BlueTEC diesel exhaust treatment (SCR)) MODEL 212.0/2 with CODE 421 (9G-TRONIC) with CODE B03 (ECO start/stop function) MODEL 212.0/2 with CODE 427 (7G-TRONIC) with CODE B03 (ECO start/stop function) MODEL 212 with CODE ME04 (Mild hybrid drive) MODEL 218 with CODE B03 (ECO start/stop function) without CODE 4U7 (Start/stop voltage dip protector) Nut (7) remains on electrical line (8).
7	Disconnect electrical connector (10)
8	Remove bolts (11, 12) from relay for ECO start/stop function additional battery (K114)	MODEL 212.0/2 with CODE 411 (6-speed manual transmission) with CODE B03 (ECO start/stop function) with CODE U42 (BlueTEC diesel exhaust treatment (SCR)) MODEL 212.0/2 with CODE 421 (9G-TRONIC) with CODE B03 (ECO start/stop function) MODEL 212.0/2 with CODE 427 (7G-TRONIC) with CODE B03 (ECO start/stop function) MODEL 212 with CODE B03 (ECO start/stop function) with CODE ME04 (Mild hybrid drive) MODEL 218 with CODE B03 (ECO start/stop function) without CODE 4U7 (Start/stop voltage dip protector)
9	Remove ECO start/stop function additional battery relay (K114)
10	Install in the reverse order