Remove/Install Front Axle - AR33.10-P-0100LWO
Model 238
Except Code M005 (Vehicles with 4MATIC/all-wheel drive)
| 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 R1234yf 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 | |
| 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 | Protect air conditioning circuit and components from moisture when carrying out repair work | AH83.30-P-0005-01KOA | |
| Notice | Notes on handling, transport and storage of composite brake disks | AH42.10-P-9406-12LF | |
| Notice | Notes on AIR BODY CONTROL | Model 238 with code 489 (AIR BODY CONTROL) except code M005 (Vehicles with 4MATIC/all- wheel drive) | AH32.22-P-1000-03LWO |
| Notice | Notes on self-locking nuts and bolts | AH00.00-P-0001-01KOA | |
| Notes on repair work on suspension components | AH00.00-P-0100-01A | ||
| Notes on handling refrigerant R134a | AH83.30-P-0003-01KOA | ||
| Notes on handling refrigerant R1234yf | AH83.30-P-0003-02A | ||
| Remove/install | |||
| 1 | Secure vehicle on vehicle lift. | AR00.60-P-0100CW | |
| 2 | Drain pressure of AIR BODY CONTROL system using vehicle diagnosis system. | Model 238 with code 489 (AIR BODY CONTROL) except code M005 (Vehicles with 4MATIC/all- wheel drive) | |
| AD00.00-P-2000-06LWO | |||
| 3 | Deactivate easy entry and exit feature using Audio/COMAND control panel. | Model 238 with code 275 (Memory Package (driver's seat, steering column and mirror)) except code M005 (Vehicles with 4MATIC/all- wheel drive) | |
| 4 | Turn rack-and-pinion steering (11) to center position and fix steering wheel in place with holding device. | AR46.20-P-0600-01LW | |
| Fig 7 | |||
| 5 | Discharge air conditioning system. | AR83.30-P-1760LWO | |
| 6 | Mount engine support fixture. | Model 238 except code M005 (Vehicles with 4MATIC/all- wheel drive) Model 238 with engine 276.8 except code M005 (Vehicles with 4MATIC/all- wheel drive) |
AR01.10-P-2400-17MND |
| Model 238 with engine 274, 642, 654 except code M005 (Vehicles with 4MATIC/all- wheel drive) | AR01.10-P-2400-17MRD | ||
| Fig 5 | |||
| Fig 6 | |||
| Fig 2 | |||
| Fig 3 | |||
| 7 | Remove engine compartment lining at front, center and rear. | AR61.20-P-1105LWE | |
| 8 | Secure radiator package against falling down using tensioning strap (2). | Do not tighten tensioning strap (2) too far. Otherwise the components can be damaged. |
|
| 9 | Unscrew screws (14), fold up left and right radiator mount (13) and remove from aluminum strut (7). | If installed. |
|
| 10 | Remove refrigerant line (3) from condenser (5), hang to one side and seal openings with suitable stop plugs. | *BA83.30-P-1006-01R | |
| Fig 4 | |||
| 11 | Remove front wheels. | AR40.10-P-1102A | |
| 12 | Remove front right brakepad wear sensor and hang to one side. | *BA42.10-P-1002-10X | |
| 13.1 | Remove brake calipers with brakepads and secure at vehicle with attached brake hoses free of tension. | Model 238 (except 238.361/461) except code M005 (Vehicles with 4MATIC/all- wheel drive) With 4-piston fixed caliper brake. |
AR42.10-P-0070LWQ |
| 13.2 | Remove brake calipers with brake caliper supports and secure at vehicle with connected brake hoses free of tension. | With 1-piston floating caliper brake. | AR42.10-P-0070LWO |
| 14 | Remove suspension struts from spring links. | Model 238 except code 489 (AIR BODY CONTROL) except code M005 (Vehicles with 4MATIC/all- wheel drive) | AR32.25-P-1017LWO |
| Model 238 with code 489 (AIR BODY CONTROL) except code M005 (Vehicles with 4MATIC/all- wheel drive) | AR32.25-P-1017LWQ | ||
| 15 | Remove holders of electrical wiring harnesses from spring links and axle carrier and place to one side. | ||
| 16 | Remove torsion bar linkages from spring links. | AR32.35-P-3328LW | |
| 17 | Remove left front axle rpm sensor line bracket and right front axle rpm sensor line bracket from front axle carrier and hang to the side with connected electric lines. | Model 238 (except 238.361/461) except code M005 (Vehicles with 4MATIC/all- wheel drive) | AR42.30-P-0713LWO |
| 18 | Fix right and left steering knuckle in place at strut rod using tensioning strap (25). | The steering knuckles must NOT fold outward after they are detached from the upper transverse control arms. Otherwise ball joints may be damaged. |
|
| 19 | Remove right and left steering knuckle from upper transverse control arms. | AR33.25-P-0400LWO | |
| 20 | Disconnect steering coupling. | Do not twist steering wheel when the steering coupling was removed. Otherwise the clock spring contact will be destroyed. |
AR46.10-P-8000-01LW |
| Fig 1 | |||
| 21 | Disconnect electrical connectors (9, 10). | ||
| 22 | Completely remove electrical wiring harness (12) from rack-and-pinion steering (11) and remove front axle (4) and fix in place at vehicle. | ||
| 23 | Remove AIR BODY CONTROL compressor. | Model 238 with code 489 (AIR BODY CONTROL) except code M005 (Vehicles with 4MATIC/all- wheel drive) | AR32.22-P-2001LWO |
| 24 | Remove left and right cross strut. | AR61.10-P-5143LWO | |
| 25 | Remove front diagonal strut. | Model 238.4 except code M005 (Vehicles with 4MATIC/all- wheel drive) | AR61.10-P-5144LWO |
| 26 | Remove screws (21) of engine mount from front axle (4). | *BA22.10-P-1002-03O | |
| 27 | Remove right coolant circulation pump with holder and hang to one side with connected lines. | Model 238 except code M005 (Vehicles with 4MATIC/all- wheel drive) | |
| Model 238 with engine 656 except code M005 (Vehicles with 4MATIC/all- wheel drive) | AR09.41-P-6925OIB | ||
| Model 238 with engine 642 except code M005 (Vehicles with 4MATIC/all- wheel drive) | AR09.41-P-6925OGW | ||
| Model 238 with engine 276.8 except code M005 (Vehicles with 4MATIC/all- wheel drive) | AR09.41-P-6926MND | ||
| Model 238 with engine 274, 654 except code M005 (Vehicles with 4MATIC/all- wheel drive) | AR09.41-P-6925OLC | ||
| 28 | Remove left coolant circulation pump with holder and hang to one side with connected lines. | Model 238 with engine 256, 264 except code M005 (Vehicles with 4MATIC/all- wheel drive) | |
| 29 | Lift engine using engine support fixture until the guide pins of the engine mount fully extend out of the axle carrier. | ||
| 30 | Position lifting platform (24) on front axle (4) and secure with tensioning strap (23). | ||
| 000 588 03 62 00 Lifting platform | WS01.00-P-0091A | ||
| 31 | Unscrew screws (19) and remove holders of engine compartment lining from aluminum struts (7). | ||
| 32 | Remove screws (20) of front axle (4). | ||
| Notice | Notes on bolted connections with self tapping screws | AH00.00-P-0007-01SF | |
| *BA33.10-P-1001-01Q | |||
| 33 | Release air duct segments (8) and fold inward. | ||
| 34 | Lower front axle (4) slightly. | Note radiator package when lowering. Otherwise it may be damaged. |
|
| 35 | Push spring links downward and position suspension struts in front of spring links. | Carefully position the suspension struts in front of the spring control arms. Otherwise the suspension strut joints can be damaged. |
|
| 36 | Mark aluminum struts (7) relative to front axle (4) using colored pencil. | ||
| 37 | Remove all screws (18). | *BA33.10-P-1003-01Q | |
| 38 | Remove radiator mounts (6). | If installed. | |
| 39 | Pull front axle (4) slightly toward rear and remove aluminum struts (7). | ||
| 40 | Fully lower front axle (4). | Carefully lower front axle (4). Otherwise adjacent components may be damaged. |
|
| 41 | Install in the reverse order | ||
| 42 | Perform chassis alignment. | AR40.20-P-0200LWO |
ENGINE MOUNT, ENGINE SUPPORT (ENGINE SIDE)
| Number | Designation | Model 238 except code M005 (Vehicles with 4MATIC/all-wheel drive) | |
|---|---|---|---|
| BA22.10-P-1002-03O | Bolt, front engine mount to front axle carrier | Nm | 30 |
FRONT AXLE CARRIER
| Number | Designation | Model 238 | |
|---|---|---|---|
| BA33.10-P-1001-01Q | Bolt, front axle carrier to longitudinal member | Nm | 180 |
FRONT AXLE CARRIER
| Number | Designation | Model 238 | |
|---|---|---|---|
| BA33.10-P-1003-01Q | Bolt, strut (impact absorber) to front axle carrier | Nm | 23 |
FRONT AXLE BRAKE CALIPER
| Number | Designation | Model 238 (except 238.361/461) | Model 238.361/461 | |
|---|---|---|---|---|
| BA42.10-P-1002-10X | Bolt, brake wear sensor to brake caliper | Nm | 8 | 8 |
AIR CONDITIONING
| Number | Designation | Model 238 | |
|---|---|---|---|
| BA83.30-P-1006-01R | Nut/bolt, refrigerant line to condenser | Nm | 12 |