Remove/Install Front Axle - AR33.10-P-0100FR
Model 257
Shown except code M005 (4MMATIC), with radiator package (1) in rear installation position
Shown except CODE M005 (4MATIC)
Shown with code M005 (4MATIC), with radiator package in front installation position
Shown except code M005 (4MATIC), with radiator package in rear installation position
Vehicles with code M005 (4MATIC)
| 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 death caused by vehicle slipping or toppling off of the lifting platform. | Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer. | AS00.00-Z-0010-01A | |
| 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 installation position of condenser | AH83.30-P-0002-01LW | |
| Notice | Notes on self-locking nuts and bolts | AH00.00-P-0001-01KOA | |
| Notes on handling refrigerant R134a | AH83.30-P-0003-01KOA | ||
| Notes on handling refrigerant R1234yf | AH83.30-P-0003-02A | ||
| Notes on safety-relevant components | AH00.00-Z-0019-01A | ||
| Notes on repair work on suspension components | AH00.00-P-0100-01A | ||
| Remove/install | |||
| 1 | Raise vehicle and fix in place on vehicle lift. | AR00.60-P-1006A | |
| 2 | Release pressure of air suspension using vehicle diagnosis system. | Model 257 with code 489 (AIR BODY CONTROL) |
|
| AD00.00-P-2000-06FR | |||
| 3 | Deactivate easy entry and exit feature using Audio/COMAND control panel. | Model 257 with code 275 (Memory Package (driver's seat, steering column and mirror)) |
|
| 4 | Turn rack-and-pinion steering (11) to center position and fix steering wheel in place with holding device. | AR46.20-P-0500-01FR | |
| Fig 7 | |||
| 5 | Discharge air conditioning system. | AR83.30-P-1760FR | |
| Mount engine support fixture. | Model 257 | ||
| Model 257 with engine 256.9 | AR01.10-P-2400-18MSA | ||
| Model 257 with engine 656 | AR01.10-P-2400-18OIB | ||
| Fig 5 | |||
| Fig 6 | |||
| Fig 2 | |||
| Fig 3 | |||
| 7 | Remove front wheels. | AR40.10-P-1102A | |
| 8 | Remove engine compartment lining at front, center and rear. | AR61.20-P-1105FR | |
| 9 | Secure radiator package (1) against falling down using tensioning strap (2). | Do not tighten tensioning strap (2) too far. Otherwise the components can be damaged. |
|
| 10 | Remove refrigerant line (3) at condenser (5), hang to one side and seal connections. | ||
| *BA83.30-P-1006-01R | |||
| Fig 4 | |||
| 11 | Unscrew screw (14), fold up left and right radiator mount (13) and remove from aluminum strut (7). | If the radiator package (1) is installed in the front installation position. | |
| 12 | Remove front axle shafts and fix right and left steering knuckle in place on strut rod using tensioning strap (25). | Model 257 with engine 256 with transmission 725.0 with code M005 (Vehicles with 4MATIC/all-wheel drive) |
AR33.30-P-0620MSA |
| Model 257 with engine 656 with transmission 725.0 with code M005 (Vehicles with 4MATIC/all-wheel drive) The steering knuckles must NOT fold outward after they are detached from the upper transverse control arms. Otherwise ball joints may be damaged. |
AR33.30-P-0620OIB | ||
| 13.1 | Remove brake calipers with brake pads and attach to the vehicle with the brake hose attached and free of tension. | Model 257 4-piston fixed-caliper brake | |
| Model 257.361 4-piston fixed-caliper brake | AR42.10-P-0070FRB | ||
| Model 257 (except 257.361) 4-piston fixed-caliper brake | AR42.10-P-0070FRA | ||
| 13.2 | Remove brake caliper with brake caliper support and secure at vehicle with connected brake hose free of tension. | Model 257 1-piston floating caliper brake | |
| AR42.10-P-0070FR | |||
| 14 | Remove suspension struts from spring links. | Model 257 with code 489 (AIR BODY CONTROL) |
AR32.25-P-1017FRA |
| Model 257 except code 489 (AIR BODY CONTROL) |
AR32.25-P-1017FR | ||
| 15 | Unhook electrical wiring harnesses from holders on spring links and axle carrier and place to one side. | Model 257 with code M005 (Vehicles with 4MATIC/all-wheel drive) |
|
| 16 | Remove torsion bar linkages from spring link. | Model 257 except code M005 (Vehicles with 4MATIC/all-wheel drive) |
AR32.35-P-3330FR |
| 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 257 (except 257.361) except code M005 (Vehicles with 4MATIC/all-wheel drive) |
|
| AR42.30-P-0713FR | |||
| 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 | |
| 18 | Disconnect steering coupling. | AR46.10-P-8000-01FR | |
Do not twist steering wheel when the steering coupling was removed. Otherwise the clock spring contact will be destroyed. |
|||
| Fig 1 | |||
| 19 | Disconnect electrical connectors (9, 10). | ||
| 20 | Remove rack-and-pinion steering wiring harness (12) completely from rack-and-pinion steering (11) and front axle (4) and place to one side. | ||
| 21 | Remove AIR BODY CONTROL compressor. | Model 257 with code 489 (AIR BODY CONTROL) |
AR32.22-P-2001FR |
| 22 | Remove left and right diagonal strut (15). | *BA33.10-P-1002-01Q | |
| 23.1 | Remove screws (21) of front axle (4) from engine mounts. | Model 257 except code M005 (Vehicles with 4MATIC/all-wheel drive) |
|
| *BA22.10-P-1002-03N | |||
| 23.2 | Remove screws of engine mounts from front axle (4). | Model 257 with code M005 (Vehicles with 4MATIC/all-wheel drive) |
|
| Model 257 with engine 256 with code M005 (Vehicles with 4MATIC/all-wheel drive) |
AR22.10-P-4330MSA | ||
| Model 257 with engine 656 with code M005 (Vehicles with 4MATIC/all-wheel drive) |
AR22.10-P-4330OIB | ||
| 24 | Remove holder (26) with low-temperature circuit circulation pump 1 (M43/6) from crossmember and hang to one side with connected lines. | ||
| 25 | Lift engine far enough using engine support fixture so that guide pins of engine mounts are fully extended out of the front axle (4). | ||
| 26 | 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 | ||
| 27 | Remove holders of engine compartment lining from aluminum struts (7). | ||
| 28 | Unscrew screws (19). | ||
| 29 | 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 | |||
| 30 | Release air duct segments (8) and fold inward. | ||
| 31 | Lower front axle (4) slightly. | Observe radiator package (1) when lowering. Otherwise it may be damaged. |
|
| 32 | 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. |
|
| 33 | Mark aluminum struts (7) relative to front axle (4) using colored pencil. | ||
| 34.1 | Remove screws (18). | If the radiator package (1) is installed in the front installation position. | |
| *BA33.10-P-1003-01Q | |||
| 34.2 | Unscrew screws (18) and remove left and right radiator mount (6). | If the radiator package (1) is installed in the rear installation position. |
|
| *BA33.10-P-1003-01Q | |||
| 35 | Pull front axle (4) slightly toward rear and remove aluminum struts (7). | ||
| 36 | Fully lower front axle (4). | Carefully lower front axle (4). Otherwise adjacent components may be damaged. |
|
| 37 | Install in the reverse order. | ||
| 38 | Perform chassis alignment. | AR40.20-P-0200FR |
ENGINE MOUNT, ENGINE SUPPORT (ENGINE SIDE)
| Number | Designation | Model 257 | ||
|---|---|---|---|---|
| BA22.10-P-1002-03N | Bolt, front engine mount to front axle carrier | M8 | Nm | 30 |
FRONT AXLE CARRIER
| Number | Designation | Model 257 | |
|---|---|---|---|
| BA33.10-P-1001-01Q | Bolt, front axle carrier to longitudinal member | Nm | 180 |
FRONT AXLE CARRIER
| Number | Designation | Model 257 | |
|---|---|---|---|
| BA33.10-P-1002-01Q | Mount, support (strut) | Nm | 110 |
FRONT AXLE CARRIER
| Number | Designation | Model 257 | |
|---|---|---|---|
| BA33.10-P-1003-01Q | Bolt, strut (impact absorber) to front axle carrier | Nm | 23 |
AIR CONDITIONING
| Number | Designation | Model 257 | |
|---|---|---|---|
| BA83.30-P-1006-01R | Nut/bolt, refrigerant line to condenser | Nm | 12 |