Remove/Install DC/DC Converter For 48 V On-Board Electrical System - AR54.10-P-1351LFM

Model 222 

With Code B01 (48V technology) 

Shown On vehicle With Code 308 (Refrigeration compartment) 

Courtesy of MERCEDES-BENZ USA

Fig 1: DC/DC Converter For 48 V On-Board Electrical System Components Location - Model 222 With Code B01 (Shown With Code 308)

Courtesy of MERCEDES-BENZ USA

Courtesy of MERCEDES-BENZ USA

Shown On removed 48 V on-board electrical system battery (G1/3) 

Courtesy of MERCEDES-BENZ USA

Shown On removed 48 V on-board electrical system battery (G1/3) 

Courtesy of MERCEDES-BENZ USA

	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
	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
Notice	Notes on self-locking nuts and bolts		AH00.00-P-0001-01KOA
Notice	General information on vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system as well as personal protective equipment		AH00.00-Z-0300-01A
Notice	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
Notice	Notes on battery		AH54.10-P-0001-01A
	Notes on safety-relevant components		AH00.00-Z-0019-01A
	Notes on HANDS-FREE ACCESS		AH80.61-P-0001-01A
	Remove
1	Commission DC/DC converter control unit (N83/1).	When replacing DC/DC converter control unit (N83/1).
			AD00.00-P-2000-04B
2	Remove partition trim in trunk.		AR68.30-P-4600LF
3	Detach ground line of on-board electrical system battery.	The 48 V on-board electrical system is automatically disengaged from the power supply 10 s, at the latest, after disconnecting the ground line (12 V on-board electrical system).	AR54.10-P-0003LF
4	Unscrew screws (1) and remove retaining frame (2).	Model 222 with code 282 (Ski and snowboard bag) with code B01 (48V technology) Model 222 with code 308 (Refrigerated compartment in rear passenger compartment) with code B01 (48V technology)
5	Release and detach degassing pipe (9).		AR09.41-P-1311-01AL
6	Release electrical wiring harnesses (10) from threaded pin (11) and place to one side.
7	Remove nut (12).
8	Remove screws (14).
9	Pull battery frame (15) together with on-board electrical system battery for 48 V on-board electrical system (G1/3) slightly backward.
10	Disconnect electrical connector (3).
11	Remove nuts (4).
12	Remove electric lines (5) from DC/DC converter control unit (N83/1).
13	Place tensioning strap (13) to one side.
14	Remove bolts (6).
15	Remove DC/DC converter control unit (N83/1) from 48 V on-board electrical system battery (G1/3).	Detach the DC/DC converter control unit (N83/1) vertically from the 48 V on-board electrical system battery (G1/3). Otherwise the contact pin (16) will be damaged. Make sure that the DC/DC converter control unit (N83/1) is not tilted. The DC/DC converter control unit (N83/1) is bonded to the 48 V on-board electrical system battery (G1/3) by means of the thermal compound applied between the two components.
16	Check contact pin (16) and corresponding contact sleeve in DC/DC converter control unit (N83/1) for damage.	If damage is found, ↓ replace corresponding components. Remove/install battery of 48 V on-board electrical system	AR54.10-P-0022LFM
17	Clean contact surface of 48 V battery (G1/3) thoroughly.	Use a commercially available plastic spatula for cleaning. Do not damage the contact surface of the 48 V on-board electrical system battery (G1/3).
18	Clean contact surface of DC/DC converter control unit (N83/1) thoroughly.	When reusing the DC/DC converter control unit (N83/1). Use a commercially available plastic spatula for cleaning. Do not damage the contact surface of the DC/DC converter control unit (N83/1).
19	Check thread (7) for damage and soiling.	If damage or soiling is present: ↓ Recut thread (7) concerned.
20	Check seal (8) for damage.	If damage is found, ↓ Install new seal (8).
	Install
21	Apply thermal compound to DC/DC converter control unit (N83/1).	The thermal compound must be processed with a period of 1 h. To apply the thermal compound, use a commercially available double cartridge gun 50 ml.	AR54.10-P-1351-01LFM
		Thermal compound	*BR00.45-Z-1002-14A
22	Position DC/DC converter control unit (N83/1) on 48 V battery (G1/3) and press on evenly.	Position the DC/DC converter control unit (N83/1) vertically on the 48 V on-board electrical system battery (G1/3). Otherwise the contact pin (16) will be damaged. Apply the pressing-on force to the outer edges of the DC/DC converter control unit (N83/1) only. Make sure that the DC/DC converter control unit (N83/1) is not tilted. Avoid any lateral forces.
23	Screw in bolts (6).	Bolt, DC/DC converter control unit to on-board electrical system battery (48V)	*BA54.10-P-1011-01J
24	Position tensioning strap (13) over DC/DC converter control unit (N83/1).
25	Tighten nut (12) lightly by hand.
26	Position electric lines (5) on contact pins at DC/DC converter control unit (N83/1).
27	Screw on nuts (4).	Replace nuts (4).
		Nut, positive line/ground line to DC/DC converter control unit/on-board electrical system battery (48V)	*BA54.10-P-1012-01J
28	Connect electrical connector (3).
29	Move battery frame (15) together with on-board electrical system battery for 48 V on-board electrical system (G1/3) into installation position.
30	Screw in bolts (14).	Bolt, battery frame to body	*BA54.10-P-1001-01J
31	Tighten nut (12).	Nut, tensioning strap to battery frame	*BA54.10-P-1002-01J
32	Secure electrical wiring harness (10) at threaded pin (11).
33	Attach degassing pipe (9) and lock.		AR09.41-P-1311-01AL
34	Position retaining frame (2) and screw in screws (1).	Model 222 with code 282 (Ski and snowboard bag) with code B01 (48V technology) Model 222 with code 308 (Refrigerated compartment in rear passenger compartment) with code B01 (48V technology)
35	Connect ground line of on-board electrical system battery.		AR54.10-P-0003LF
36	Install partition trim in trunk.		AR68.30-P-4600LF