Remove/install front intake-side refrigerant line - AR83.50-P-6925MEV

MODEL 451.391/491 

Fig 1: Identifying Front Intake-Side Refrigerant Line Remove/Install Components (1 Of 2)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Front Intake-Side Refrigerant Line Remove/Install Components (2 Of 2)

Courtesy of MERCEDES-BENZ USA

	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 the high-voltage on-board electrical system		AH54.00-P-0010-01A
	Note on high-voltage battery		AH54.10-P-0006-01MEV
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove/install
1	Remove transmitter key and mains plug
2	Remove refrigerant line (2) between condenser and expansion valves	The front intake side refrigerant line (1) cannot be removed separately. It can only be removed together with the front pressure side refrigerant line (3). These must be disconnected from each other while removed and can be individually replaced.	AR83.30-P-7817MEV
3	Disconnect electrical connector (4) from refrigerant pressure sensor (B12)
4	Remove rivet (5) and remove bracket (6) towards the front
5	Unscrew nut (10) and remove screw/bolt (11)	Ensure that the front wheels are in the straight-ahead position. Replace nut (10) and screw/bolt (11). Only use the nut (10) and screw/bolt (11) that are approved for model 451. Bolts and nuts of other models with the same dimensions have different properties due to other surface coatings and may impair the strength of the bolted connection.
		Screw/bolt, steering coupling to rack-and-pinion steering	*BA46.10-P-1001-01F
6	Pull off steering coupling (12) upwards from rack-and-pinion steering (13)
7	Remove bolts (9)	Bolt, rack-and-pinion steering to front axle carrier	*BA46.20-P-1001-01G
8	Remove rack-and-pinion steering (13) from front axle carrier (14) and move forwards	Move rack-and-pinion steering (13) forwards far enough for front intake side refrigerant line (1) to be removed together with the front pressure side refrigerant line (3).
9	Secure rack-and-pinion steering (13) with suitable aids to prevent it from lowering	Do not allow the rack-and-pinion steering (13) to hang down on the electrical lines or the tie rods. Otherwise the components will be damaged and must be repaired or replaced accordingly.
10	Carry out disconnection of high-voltage system	After completing the work, attach initial startup event log together with the power disable event log to the vehicle file.	AR54.10-P-1160MEV
11	Remove high-voltage battery		AR54.10-P-1140MEV
12	Remove screw/bolt (15) and remove both brackets (17)	Bolt, refrigerant line holder to intake side/pressure side refrigerant line	*BA83.55-P-1009-01V
13	Pull refrigerant lines (16) from front intake side refrigerant line (1) and front pressure side refrigerant line (3)
	Compressor oils (specification 362.0)		MB 362.0 compressor oil A 001 989 08 03
		Seal off refrigerant line (16), front intake side refrigerant line (1) and front thrust side refrigerant line (3) with suitable stop plugs. Otherwise, penetrating dirt and moisture will damage the components that are attached to the refrigerant circuit. Replace sealing ring (20) at front intake side refrigerant line (1) and front thrust side refrigerant line (3). Coat sealing rings (20) with compressor oil when inserting Attach refrigerant lines (16) free of tension.
14	Remove bolt (19)
15	Remove bracket (18)	Check seals (21) for damage and replace if necessary. Ensure that seals (21) are seated properly.
16	Lead front intake side refrigerant line (1) and front pressure side refrigerant line (3) together out of the body towards the front and remove	Aid of helper required.
17	Cut cable ties (7) and remove insulation material (8)	When installing a new front intake side refrigerant line (1) or front pressure side refrigerant line (3). Replace cable tie (7). Check insulation material (8) for damage, install new material if necessary.
18	Install in the reverse order

STEERING SHAFT

Number	Designation		MODEL 451.3/4
BA46.10-P-1001-01F	Screw/bolt, steering coupling to rack-and-pinion steering	Nm	20

STEERING GEAR

Number	Designation			MODEL 451.3/4
BA46.20-P-1001-01G	Bolt, rack-and-pinion steering to front axle carrier	Stage 1	Nm	70
		Stage 2	∠°	-

REFRIGERANT COMPRESSOR

Number	Designation		ENGINE 780.009
BA83.55-P-1009-01V	Bolt, refrigerant line holder to intake side/pressure side refrigerant line	Nm	11