Remove/install DC/DC converter - AR54.10-P-1350SXH

Model 221.095/195

Fig 1: Identifying DC/DC Converter Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of death when touching components on vehicles with high-voltage on-board electrical system	Do not touch components and open lines of the high-voltage on-board electrical system. Persons who wear electronic implants (e.g. cardiac pacemakers), must not carry out any work on high-voltage on-board electrical systems.	AS54.00-Z-0001-01A
	Note on high-voltage on-board electrical system		AH54.00-P-0010-01A
	Evaluation of high-voltage components		AH54.00-P-6500-01SXH
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
1	Open engine hood
2	Perform disable for the high-voltage on-board electrical system		AR54.10-P-1150SXH
2		After completing the work, enclose the initial startup event log together with the power disable event log in the vehicle file.
3	Switch off ignition
4	Disconnect battery ground cable		AR54.10-P-0003SX
	Notes on battery		AH54.10-P-0001-01A
5	Release pressure in cooling system	Carefully open cap on expansion reservoir and then close again.
6	Lift vehicle on vehicle lift		AR00.60-P-1000SX
7	Detach right front wheel
			AP40.10-P-4050SX
8	Remove rear section of right fender liner in right fender
9	Clamp off coolant feed line (1) and coolant return line (2) on DC/DC converter control unit (N83/1) using a suitable tool
10	Detach protective cap (3), detach circuit 30 positive line (4) from DC/DC converter control unit (N83/1) and cover with protective covers
	Wax preservation agents for underbody		BB00.40-P-0385-01A
		Clean the connecting points. Do not use any sharp-edged tools or abrasive paper. Only clean connecting points with safety cleaner. The protective cap (3) of the circuit 30 positive line (4) must be replaced each time it is removed. Fill protective cap (3) with wax prior to assembly. After assembly, make sure that the complete cable lug of the circuit 30 positive line (4) is covered with wax.
		Nut, 12 volt connection to DC/DC converter	*BA54.10-P-1035-01C
		Set of protective covers	Figure
11	Detach coolant feed line (1) and coolant return line (2) from DC/DC converter control unit (N83/1)	Collect flowing out coolant in a suitable vessel.
12	Unscrew bolt (5) and remove ground strap (6) from DC/DC converter control unit (N83/1)	Clean the connecting points. Do not use any sharp-edged tools or abrasive paper otherwise the protective alloy will be damaged. Only clean connecting points with safety cleaner.
12		Bolt, ground strap/line to DC/DC converter	*BA54.10-P-1033-01C
13	Detach signal contact connector (7) from DC/DC converter control unit (N83/1)	Seal the line connections using new, clean protective covers.
13		Set of protective covers	Figure
14	Detach disconnect connector (8) from DC/DC converter control unit (N83/1)	Seal the line connections using new, clean protective covers.
14		Set of protective covers	Figure
15	Unscrew nuts (9) from bracket and remove DC/DC converter control unit (N83/1)	The DC/DC converter control unit (N83/1) must not be subjected to any severe impacts. The DC/DC converter control unit (N83/1) can otherwise be damaged.
15		Bolt/nut, DC/DC converter to bracket	*BA54.10-P-1032-01C
16	Replace ground strap (6)	When replacing the DC/DC converter control unit (N83/1).
16	Replace ground strap (6)	Bolt, ground strap/line to longitudinal member	*BA54.10-P-1034-01C
17	Install in the reverse order
18	Pour in coolant and bleed cooling system and turn transmitter key in EZS control unit to position 1 for approx. 5 s and then turn key back to position 0	Repeat the procedure twice after a waiting time of about 30 s in order to fill and bleed the low-temperature water circuit.
19	Correct coolant level in the expansion reservoir and check cooling system for leak tightness		AR20.00-P-1010SX
20	Perform initial startup of DC/DC converter control unit (N83/1) using Star Diagnosis
			AD00.00-P-2000-04A

BATTERY

Number	Designation		Model 221
BA54.10-P-1032-01C	Bolt/nut, DC/DC converter to bracket	Nm	5

BATTERY

Number	Designation		Model 221
BA54.10-P-1033-01C	Bolt, ground strap/line to DC/DC converter	Nm	9

BATTERY

Number	Designation		Model 221
BA54.10-P-1034-01C	Bolt, ground strap/line to longitudinal member	Nm	9

BATTERY

Number	Designation		Model 221
BA54.10-P-1035-01C	Nut, 12 volt connection to DC/DC converter	Nm	9

Fig 2: Identifying Set Of Protective Covers (001 589 01 91 00)

Courtesy of MERCEDES-BENZ USA