Remove/Install Engine With Front Axle Carrier - AR01.10-P-2500RFB
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Engine 274.9 in model 253 with code M005 (Vehicles with 4MATIC/all-wheel drive)
| 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 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. Engine 274.9 in model 253.354/954 with code M005 (Vehicles with 4MATIC/all-wheel drive) | AS00.00-Z-0035-01A | |
| Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel as well as risk of injury to eyes and skin caused by contact with fuel. | No fires, sparks, open flames or smoking. Pour fuels into suitable and appropriately marked containers only. Wear protective clothing when handling fuel. | AS47.00-Z-0001-01A | |
| 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 to skin and eyes due to handling of engine oil. Risk of poisoning caused by swallowing engine oil | Wear protective gloves, protective clothing and safety glasses. Do not fill engine oil into beverage containers. |
AS18.00-Z-0001-01A | |
| Risk of injury caused by scraping or cutting body parts on sharp vehicle parts | Always wear protective gloves when working on or near sharp and non-deburred vehicle parts. Deburr repair panels. |
AS00.00-Z-0017-01A | |
| Notes on self-locking nuts and bolts | AH00.00-P-0001-01KOA | ||
| Notice | Notes on bolted connections with self tapping screws | AH00.00-P-0007-01SF | |
| 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 | Notes on avoiding damage through contamination and foreign objects | AH00.00-P-5000-01A | |
| Notice | Information on preventing damage to electronic components due to electrostatic discharge | AH54.00-P-0001-01A | |
| Note on calculation of tightening torque when using insertion or socket tools with various effective lengths | AH00.00-P-0015-01CW | ||
| General information on work on gasoline direct injection system | AH07.00-P-2000-01A | ||
| Use of engine no. when installing reconditioned engines and factory-new replacement engines or crankcases | AH01.10-P-0001-01A | ||
| Notes on repair work on suspension components | AH00.00-P-0100-01A | ||
| Notes on automatic transmission | Engine 274.9 in model 253 with transmission 724.2 with code M005 (Vehicles with 4MATIC/all-wheel drive) Engine 274.9 in model 253 with transmission 725.0 with code M005 (Vehicles with 4MATIC/all-wheel drive) |
AH27.19-P-0001-01NKB | |
| Notes on AIRmatic | Engine 274.9 in model 253 with code 489 (AIR BODY CONTROL) with code M005 (Vehicles with 4MATIC/all-wheel drive) | AH32.22-P-1000-02LW | |
| Remove/install | |||
| 1 | Secure vehicle against rolling away, shift transmission to neutral position, and release parking brake. | ||
| 2 | Move front wheels to straight-ahead position and fix steering wheel in place with holding device. | Fig 4 | |
| 3 | Deactivate easy entry and exit feature. | Engine 274.9 in model 253 with code 275 (Memory Package (driver's seat, steering column and mirror)) with code M005 (Vehicles with 4MATIC/all-wheel drive) |
|
| 4 | Perform power disconnect of high-voltage onboard electrical system. | Engine 274.9 in model 253.354/954 with code M005 (Vehicles with 4MATIC/all-wheel drive) | AR54.10-P-1150LVH |
| 5 | Disconnect ground line from battery. | AR54.10-P-0003LW | |
| 6 | Secure vehicle on vehicle lift. | AR00.60-P-0100CW | |
| 7 | Relieve pressure in the air suspension with the diagnostic system. | ||
| Engine 274.9 in model 253 with code 489 (AIR BODY CONTROL) with code M005 (Vehicles with 4MATIC/all-wheel drive) |
AD00.00-P-2000-04B | ||
| 8 | Remove upper engine cover. | ||
| 9 | Remove lower engine compartment paneling. | AR61.20-P-1105LW | |
| 10 | Remove fuel pressure via the service connection. | AR07.03-P-1460-01MR | |
| *BA07.03-P-1003-01F | |||
| Fig 6 | |||
| 11 | Drain engine cooling system coolant. | AR20.00-P-1142LW | |
| 12 | Drain off low-temperature circuit coolant. | AR09.41-P-6834LW | |
| 13 | Discharge air conditioning system. | AR83.30-P-1760LW | |
| 14 | Disconnect refrigerant lines (1) from the separating points and seal openings with suitable stop plugs. | ||
| Compressor oils (specification 362.1) | Use new sealing rings. Wet all threads and |
BB00.40-P-0362-01A | |
| sealing rings with compressor oil. Refrigerant can otherwise escape. | |||
| *BA83.30-P-1004-01Q | |||
| Fig 5 | |||
| 15 | Place refrigerant line (2) to one side. | ||
| 16 | Remove engine air intake duct upstream of air filter housing. | ||
| 17 | Disconnect engine wiring harness and place to one side. | Engine 274.9 in model 253.354/954 with transmission 724.2 with code M005 (Vehicles with 4MATIC/all-wheel drive) |
AR15.18-P-1000-05MRB |
| Engine 274.9 in model 253 with transmission 716.7 with code M005 (Vehicles with 4MATIC/all-wheel drive) Engine 274.9 in model 253 with transmission 725.0 with code M005 (Vehicles with 4MATIC/all-wheel drive) |
AR15.18-P-1000-05MRC | ||
| *BA54.18-P-1001-02C | |||
| *BA00.19-P-1043-01E | |||
| *BA00.10-P-1002-04A | |||
| 18 | Remove coolant vent line (4) from cylinder head cover and coolant pipe. | Fig 2 | |
| 19 | Remove coolant hose (3) from oil cooler. | AR20.20-P-7441-01RQ | |
| 20 | Unclip oil cooler from the fan unit and secure to the engine against falling down with connected lines. | ||
| 21 | Remove coolant hose (5) from engine. | Fig 2 | |
| 22 | Remove coolant hose (7) from firewall. | AR20.20-P-7441-01RQ | |
| 23 | Remove vacuum line (11) from firewall. | ||
| 24 | Release and disconnect purge line (10) and seal with suitable stop plugs. | Fig 5 | |
| 25 | Remove low-temperature circuit coolant line from charge air cooler. | AR20.20-P-7441-01RQ | |
| 26 | Remove low-temperature circuit coolant line from the oil filter housing. | *BA00.10-P-1002-04A | |
| 27 | Remove all coolant hoses from the cooler and from the low-temperature circuit cooler. | AR20.20-P-7441-01RQ | |
| 28 | Remove front bumper. | AR88.20-P-2000LW | |
| 29 | Remove screws (30) and remove holders (31) | *BA62.30-P-1004-01H | |
| 30 | Release and disconnect electrical connectors from electric power steering actuator motor. | AR46.20-P-0600LW | |
| 31 | Unclip wiring harness of electric power steering from front axle carrier. | ||
| 32 | Remove center exhaust system. | AR49.10-P-7283RF | |
| 33 | Remove fuel hose (22) from the engine and seal connections with suitable stop plugs. | ||
| Fig 3 | |||
| Fig 5 | |||
| 34 | Remove propeller shaft from transmission output flange and secure on vehicle against falling down. | AR41.10-P-0050LWX | |
| 35 | Remove covers over the diagonal struts (25). | AR61.30-P-1001LW | |
| 36 | Remove diagonal struts (25). | *BA61.10-P-1007-01L | |
| *BA61.10-P-1006-01L | |||
| Fig 1 | |||
| 37 | Remove rear screws of longitudinal struts from front axle carrier. | *BA61.10-P-1007-01L | |
| 38 | Remove steering coupling (23) from the steering shaft. | Do not turn steering wheel when steering coupling (23) is removed. Otherwise the clock spring contact will be destroyed. |
|
| 39.1 | Remove brake calipers with brakepads and attach to the vehicle with the brake hose attached and free of tension. | Engine 274.9 in model 253 with code M005 (Vehicles with 4MATIC/all-wheel drive) 4-piston fixed-caliper brake | |
| AR42.10-P-0070LWA | |||
Do not kink, crush or subject lines to tension. This leads to line damage. |
|||
| 39.2 | Detach brake calipers with brake caliper supports and fasten to vehicle free of tension with brake hose connected. | Engine 274.9 in model 253 with code M005 (Vehicles with 4MATIC/all-wheel drive) 1-piston floating caliper brake | |
Do not kink, crush or subject lines to tension. This leads to line damage. |
AR42.10-P-0070LW | ||
| 40 | Remove rpm sensors from steering knuckles. | AR42.30-P-0712LW | |
| 41 | Unclip electric lines from spring links and steering knuckles. | ||
| 42 | Remove steering knuckles from the top transverse control arms and secure steering knuckles. | AR33.25-P-0400LW | |
Secure steering knuckle. Otherwise the joints will be damaged. |
|||
| 43 | Remove suspension struts from spring links. | Engine 274.9 in model 253 with code 489 (AIR BODY CONTROL) with code M005 (Vehicles with 4MATIC/all-wheel drive) |
AR32.25-P-1017LWL |
| Engine 274.9 in model 253 with code M005 (Vehicles with 4MATIC/all-wheel drive) except code 489 (AIR BODY CONTROL) |
AR32.25-P-1017LW | ||
| 44 | Secure radiator package against falling down. | ||
| 45 | Remove bottom brackets of the radiator package from damping. | AR20.20-P-3865RF | |
| 46 | Remove bottom refrigerant line from the condenser and seal connections with suitable stop plugs. | ||
| Compressor oils (specification 362.1) | Use new sealing rings. Wet all threads and sealing rings with compressor oil. Refrigerant can otherwise escape. |
BB00.40-P-0362-01A | |
| *BA83.30-P-1002-01Q | |||
| Fig 5 | |||
| 47 | Remove mounting bolt of lower refrigerant line from capacitor. | *BA00.10-P-1002-04A | |
| 48 | Remove high-voltage energy distributor (26) from power electronics. | Engine 274.9 in model 253.354/954 with code M005 (Vehicles with 4MATIC/all-wheel drive) | |
| AR08.20-P-0011LVH | |||
| 49 | Unclip attachment point (28). | Engine 274.9 in model 253.354/954 with code M005 (Vehicles with 4MATIC/all-wheel drive) | |
| 50 | Remove high voltage line (32) from the frame floor assembly. | Engine 274.9 in model 253.354/954 with code M005 (Vehicles with 4MATIC/all-wheel drive) |
|
| 51 | Remove wiring of the rear high voltage line from the frame floor assembly and place to one side. | Engine 274.9 in model 253.354/954 with code M005 (Vehicles with 4MATIC/all-wheel drive) |
|
| 52 | Unclip attachment point (29). | Engine 274.9 in model 253.354/954 with code M005 (Vehicles with 4MATIC/all-wheel drive) |
|
| 53 | Remove high voltage line (33) from the PTC heater. | Engine 274.9 in model 253.354/954 with code M005 (Vehicles with 4MATIC/all-wheel drive) |
|
| AR83.70-P-8001LWH | |||
| 54 | Support front axle carrier and secure engine transmission unit against slipping and falling down using suitable means. | ||
| 000 588 03 62 00 Lifting platform | WS01.00-P-0091A | ||
| Engine 274.9 in model 253.354/954 with code M005 (Vehicles with 4MATIC/all-wheel drive) Carefully support the front axle carrier. Otherwise damage will occur to the high-voltage energy distributor (26) and the high-voltage lines (32, 33). |
|||
| 55 | Remove rear engine crossmember from the frame floor assembly. | AR22.10-P-4360LWB | |
| 56 | Remove screws of front axle carrier from longitudinal members. | *BA33.10-P-1001-01Q | |
| 57 | Lower front axle carrier with the engine transmission unit. | ||
| 000 588 03 62 00 Lifting platform | WS01.00-P-0091A | ||
Ensure that engine does not touch the body panels or major assemblies. Do not kink, crush or subject lines to tension. This leads to component and/or line damage. |
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| 58 | Install in the reverse order. | ||
| Concluding tasks | |||
| 59 | Check engine oil level and correct if necessary. | ||
| AP18.00-P-1811MP | |||
| 60 | Check oil level of the transmission and correct if necessary. | Engine 274.9 in model 253 with transmission 725.047 with code M005 (Vehicles with 4MATIC/all-wheel drive) |
AR27.00-P-0270EWH |
| Engine 274.9 in model 253 with transmission 716.7 with code M005 (Vehicles with 4MATIC/all-wheel drive) |
AR26.00-P-0200LW | ||
| Engine 274.9 in model 253 with transmission 724.2 with code M005 (Vehicles with 4MATIC/all-wheel drive) |
AR27.00-P-0270EH | ||
| Engine 274.9 in model 253 with transmission 725.0 (except 725.047) with code M005 (Vehicles with 4MATIC/all-wheel drive) |
AR27.00-P-0270EWN | ||
| 61 | Perform wheel alignment measurement. | AR40.20-P-0200LW | |
| Risk of burn injuries , suffocation and poisoning when working on the exhaust system and the components connected to it. Risk of suffocation and risk of poisoning caused by inhalation of gaseous and solid components of the exhaust. Risk of poisoning caused by skin contact with solid components of the exhaust. | Wear protective clothing and safety glasses. Use the extraction system. Move people out the danger zone. |
AS49.00-Z-0001-01A | |
| Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running. | Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. | AS00.00-Z-0005-01A | |
| 62 | Perform an engine test run and check engine and transmission for proper operation and leak tightness while doing so. |
METRIC SCREWS/BOLTS AND NUTS AS PER MBN 10 105, 10 143
| Number | Designation | 8.8 | 10.9 | |
|---|---|---|---|---|
| BA00.10-P-1002-04A | M6X1 | Nm | 9 | 13 |
GROUND POINTS
| Number | Designation | Model 253 (except 253.99) as of model year 2020 |
Model 253 (except 253.99) up to model year 2020 |
||
|---|---|---|---|---|---|
| BA00.19-P-1043-01E | Nut, ground line to pin/underfloor | M8 | Nm | 20 | 20 |
INJECTION NOZZLES, INJECTION VALVES, LINES
| Number | Designation | Engine 274 | ||
|---|---|---|---|---|
| BA07.03-P-1003-01F | Dust cap at service connection | Plastic | Nm | 2 |
| Metal | Nm | 15 | ||
FRONT AXLE CARRIER
| Number | Designation | Model 253 | |
|---|---|---|---|
| BA33.10-P-1001-01Q | Bolt, front axle carrier to longitudinal member | Nm | 180 |
WIRING HARNESS
| Number | Designation | Model 253 | ||
|---|---|---|---|---|
| BA54.18-P-1001-02C | Nut, positive line to busbar on firewall | M6 | Nm | 8 |
| M8 | Nm | 16 | ||
FRAME FLOOR ASSEMBLY
| Number | Designation | Model 253 | |
|---|---|---|---|
| BA61.10-P-1006-01L | Bolt, front diagonal strut to front axle carrier/torsion bar bearing shell/radiator mounting console | Nm | 50 |
FRAME FLOOR ASSEMBLY
| Number | Designation | Model 253 | |
|---|---|---|---|
| BA61.10-P-1007-01L | Bolt, front diagonal strut to longitudinal member | Nm | 50 |
CROSS MEMBER AND FRONT REINFORCEMENT
| Number | Designation | Model 253 | ||
|---|---|---|---|---|
| BA62.30-P-1004-01H | Bolt, strut to soundproofing | M8 | Nm | 20 |
AIR CONDITIONING
| Number | Designation | Model 253 | |
|---|---|---|---|
| BA83.30-P-1002-01Q | Nut, line to condenser | Nm | 12 |
AIR CONDITIONING
| Number | Designation | Model 253 | ||
|---|---|---|---|---|
| BA83.30-P-1004-01Q | Nut, refrigerant line to connecting point | M6 | Nm | 12 |