Remove/Install Front Engine Mount - AR22.10-P-4330LWA
Engine 264 in model 253 except code M005 (Vehicles with 4MATIC/all-wheel drive)
Engine 264, 274.9 in model 205 except code M005 (Vehicles with 4MATIC/all-wheel drive)
MODIFICATION NOTES
| 12.08.2019 | Basic data inserted. | Operation steps 12, 13, 18, 19 |
Shown on front right engine mount (2) on the engine 274.9
Shown on front right engine mount (2) on the engine 264
| 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 | |
| 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 injury caused by scraping or cutting body parts on sharp vehicle parts. Deburr repair panels. | Always wear protective gloves when working on or near sharp and non-deburred vehicle parts. | AS00.00-Z-0017-01A | |
| Risk of injury . Skin or eye injuries may result when handling hot or glowing objects. | Wear protective gloves, protective clothing and safety glasses, if necessary. | AS00.00-Z-0002-01A | |
| 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 | |
| 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 | ||
| Notes on threaded connections fastened using a tightening angle-based tightening process | AH00.00-P-0020-01A | ||
| Remove/install | |||
| 1 | Deactivate memory package. | Engine 264 in model 253 with code 275 (Memory Package (driver's seat, steering column and mirror) except code M005 (Vehicles with 4MATIC/all-wheel drive) | |
| Engine 264, 274.9 in model 205 with code 275 (Memory Package (driver's seat, steering column and mirror) except code M005 (Vehicles with 4MATIC/all-wheel drive) | |||
| 2 | Turn rack-and-pinion steering to center position (front wheels in straight-ahead position) and fix steering wheel in place with holding device. | Fault on clock spring contact possible. |
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| Fig 6 | |||
| 3 | Perform power disconnect of high-voltage on-board electrical system. | Engine 274.9 in model 205.047/053/054/147/247/253 except code M005 (Vehicles with 4MATIC/all-wheel drive) | AR54.10-P-1150LW |
| 4 | Remove engine air intake duct upstream of air filter. | ||
| 5 | Remove center and rear sections of lower engine compartment lining. | AR61.20-P-1105LW | |
| 6 | Release and disconnect high voltage of the refrigerant compressor. | Engine 274.9 in model 205.047/053/054/147/247/253 except code M005 (Vehicles with 4MATIC/all-wheel drive) When removing the front left engine mount (2) | |
| 7 | Unclip high-voltage line from charge air cooler bracket and place to one side. | Engine 274.9 in model 205.047/053/054/147/247/253 except code M005 (Vehicles with 4MATIC/all-wheel drive) When removing the front left engine mount (2) |
|
| 8 | Drain off coolant. | Engine 264 in model 205, 253 except code M005 (Vehicles with 4MATIC/all-wheel drive) | AR20.00-P-1142MRI |
| Engine 274.9 in model 205 except code M005 (Vehicles with 4MATIC/all-wheel drive) | AR20.00-P-1142LW | ||
| 9 | Disconnect exhaust system between CAT and center muffler. | Engine 264 in model 205, 253 except code M005 (Vehicles with 4MATIC/all-wheel drive) | AR49.10-P-7283MRI |
| Engine 274.9 in model 205 except code M005 (Vehicles with 4MATIC/all-wheel drive) | AR49.10-P-7283LW | ||
| 10 | Unclip engine management control unit with bracket and place to one side with connected lines. | Engine 274.9 in model 205 except code M005 (Vehicles with 4MATIC/all-wheel drive) | AR07.08-P-7008MRA |
| Engine 264 in model 205, 253 except code M005 (Vehicles with 4MATIC/all-wheel drive) | AR07.08-P-1000MRI | ||
| 11 | Unscrew screws (1) from the front left engine mount (2). | BA22.10-P-1002-03M | |
| *BA22.10-P-1001-03E | |||
| 12 | Unscrew screws (1) from the front right engine mount (2). | BA22.10-P-1002-03M | |
| *BA22.10-P-1001-03E | |||
| Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant. | Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers. | AS20.00-Z-0001-01A | |
| Wear protective gloves, protective clothing and safety glasses. | |||
| 13 | Remove coolant hose to heater cooler from bulkhead. | AR20.20-P-7441-01RQ | |
| 14 | Remove wiper arms. | AR82.30-P-6100LW | |
| 15.1 | Install engine support fixture and raise engine. | Engine 274.9 in model 205 except code M005 (Vehicles with 4MATIC/all-wheel drive) | AR33.10-P-0105LW |
Otherwise damage will occur. |
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| 15.2 | Install engine support fixture and raise engine. | Engine 264 in model 205, 253 except code M005 (Vehicles with 4MATIC/all-wheel drive) | AR01.10-P-2400-17MRI |
| Otherwise damage will occur. | |||
| *BA20.20-P-1002-02B | |||
| Fig 5 | |||
| Fig 3 | |||
| Fig 4 | |||
| Fig 2 | |||
| 16 | Remove steering coupling from steering shaft. | AR46.10-P-8000LW | |
| 17 | Unscrew screws (5) from front left engine mount (2). | BA22.10-P-1002-03M | |
| *BA22.10-P-1002-03E | |||
| 18 | Unscrew screws (5) from front right engine mount (2). | BA22.10-P-1002-03M | |
| *BA22.10-P-1002-03E | |||
| 19 | Remove both front engine mounts (2) downwards. | ||
| 20 | Install in the reverse order. |
ENGINE RADIATOR, COOLANT HOSES AND LINES
| Number | Designation | Engine 264 | |
|---|---|---|---|
| BA20.20-P-1002-02B | Screw, low-temperature circuit expansion reservoir to crossmember | Nm | 8 |
ENGINE MOUNT, ENGINE SUPPORT (ENGINE SIDE)
| Number | Designation | Model 205 | |||
|---|---|---|---|---|---|
| BA22.10-P-1001-03E | Bolt, front engine mount to engine support | M10 | Nm | 50 | |
| M12 | Stage 1 | Nm | 45 | ||
| Stage 2 | ∠° | 120 | |||
ENGINE MOUNT, ENGINE SUPPORT (ENGINE SIDE)
| Number | Designation | Model 205 | ||
|---|---|---|---|---|
| BA22.10-P-1002-03E | Screw/bolt, front engine mount to front axle carrier | M8 | Nm | 30 |
ENGINE MOUNT, ENGINE SUPPORT (ENGINE SIDE)
| Number | Designation | Model 253 (except 253.388/389/988/98 9/992/993) | |
|---|---|---|---|
| BA22.10-P-1002-03M | Screw/bolt, front engine mount to front axle carrier | Nm | 30 |