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Home >> Mercedes Benz >> 2018 >> S450 Base >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control System - 222 Chassis (2 Of 4) >> Testing & Repair >> Remove/Install Electric Refrigerant Compressor >> Remove/Install Electric Refrigerant Compressor - AR83.55-P-5311LFH

Remove/Install Electric Refrigerant Compressor - AR83.55-P-5311LFH

Engine 276.8 in Model 222.163/173 

G15367430Courtesy of MERCEDES-BENZ USA
G15367431Courtesy of MERCEDES-BENZ USA
G15367432Courtesy of MERCEDES-BENZ USA
G15367433Courtesy of MERCEDES-BENZ USA
DANGER Risk of death  when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC) Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines. AS00.00-Z-0035-01A
DANGER Risk of fire  due to ignition of R1234yf refrigerant on hot components. Risk of poisoning  caused by inhaling overheated refrigerant vapors. Risk of injury  to skin and eyes caused by contact with escaped R1234y refrigerant and when working on pressurized parts. Risk of explosion  due to formation of ignitable refrigerant/air mixtures Never perform welding work on or near a closed air conditioning system. No smoking or open flames. Wear safety glasses and protective gloves. Work only in well ventilated rooms. Carry out repair work on the air conditioning system circuit only after the system has been evacuated. AS83.00-Z-0007-01A
WARNING Risk of poisoning  caused by inhaling overheated refrigerant vapors from an air conditioning system containing R134a. Risk of injury  to skin and eyes caused by contact with liquid R134a refrigerant and when working on pressurized parts Never perform welding work on or near a closed air conditioning system. No smoking or open flames. Wear safety glasses and protective gloves. Work only in well ventilated rooms. Carry out repair work on the air conditioning system circuit only after the system has been evacuated. AS83.00-Z-0006-01A
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
Notice  Protect air conditioning circuit and components from moisture when carrying out repair work   AH83.30-P-0005-01KOA
  Notes on handling refrigerant R134a   AH83.30-P-0003-01KOA
  Notes on handling refrigerant R1234yf   AH83.30-P-0003-02A
REMOVINGINSTALLING Remove/install     
1 Perform disable for the high-voltage on-board electrical system   AR54.10-P-1150LF
2 Switch off ignition and store transmitter key outside of transmission range (at least 2 m)    
3 Remove lower engine compartment paneling   AR61.20-P-1105LF
4 Remove upper engine cover    
5 Remove the left cover in the engine compartment    
6 Remove left intake air duct    
7 Drain air conditioning system   AR83.30-P-1760LF 
8 Remove electric vacuum pump (11)   AR43.05-P-0001LF
9 Remove left charge air line (2)   AR09.41-P-8620LFA
10 Slacken off poly-V-belt (4), remove from belt pulley and secure clamping device against turning using rig pin (5)   AR13.20-P-0001LFA
11 Unclip electrical wiring harness with electrical connection (6) from retaining clips (7) and place to one side    
12 Remove screws/bolts (8, 9) and remove bracket (10) TORQUE SPECIFICATION Model 222.163/173 with engine 276Screw/bolt, bracket for electrical vacuum pump to timing case/crankcase *BA43.05-P-1006-01K 
13 Disconnect high-voltage connector (12) at electrical refrigerant compressor (1) and place high-voltage line to one side    
14 Seal high-voltage connector (12) and high-voltage connector socket at electrical refrigerant compressor (1) using protective covers SPECIAL TOOL Set of protective covers Fig 1
15 Remove screw (20) of the electric refrigerant compressor mount (1) at the engine control unit housing cover TORQUE SPECIFICATION Screw/bolt, refrigerant compressor to timing case/crankcase/engine support *BA83.55-P-1001-01M 
16 Remove screws (14, 15), remove refrigerant lines (16) from the electric refrigerant compressor (1) and close the openings with suitable stop plugs TORQUE SPECIFICATION Bolt, refrigerant line to refrigerant compressor *BA83.55-P-1003-01M 
    SPECIAL TOOL Record plug Fig 2
17 Brace electrical refrigerant compressor (1) and secure it to prevent it from falling down    
18 Remove bolt (17) TORQUE SPECIFICATION Screw/bolt, refrigerant compressor to timing case/crankcase/engine support *BA83.55-P-1001-01M 
19 Remove screw/bolt (18) TORQUE SPECIFICATION Screw/bolt, refrigerant compressor to timing case/crankcase/engine support *BA83.55-P-1001-01M 
20 Release and disconnect electrical connector (19) at the electrical refrigerant compressor (1)    
21 Close off electrical connector (19) with a protective cover SPECIAL TOOL Set of protective covers Fig 1
22 Remove electric refrigerant compressor (1) in an upward direction NOTES Carefully remove electric refrigerant compressor (1).
Otherwise the electric refrigerant compressor (1) will be damaged.
 
23 Install in the reverse order    
24 Perform initial startup of electric refrigerant compressor (1) with diagnosis system When replacing electric refrigerant compressor (1).  
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-04B
VACUUM PUMP

Number Designation Engine 276 in model 166, 222
BA43.05-P-1006-01K Screw/bolt, bracket for electrical vacuum pump to timing case/crankcase Nm 35
REFRIGERANT COMPRESSOR

Number Designation Engine 276
BA83.55-P-1001-01M Screw/bolt, refrigerant compressor to timing case/crankcase/engine support Nm 20
REFRIGERANT COMPRESSOR

Number Designation Engine 276
BA83.55-P-1003-01M Bolt, refrigerant line to refrigerant compressor M8 Nm 20
Fig 1: Identifying Set Of Protective Covers (001 589 06 91 00)
G14785718Courtesy of MERCEDES-BENZ USA
Fig 2: Identifying Record Plug (129 589 00 91 00)
G09975019Courtesy of MERCEDES-BENZ USA