Remove/Install Engine With Transmission - AR01.10-P-2401MRB
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Engine 274.9 in model 253
except code M005 (Vehicles with 4MATIC/all-wheel drive)
| 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 . 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 | |
| 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 | |
| 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 | |
| Notice | Notes on bolted connections with self tapping screws | AH00.00-P-0007-01SF | |
| Notice | Notes on avoiding damage through contamination and foreign objects | AH00.00-P-5000-01A | |
| Notes on self-locking nuts and bolts | AH00.00-P-0001-01KOA | ||
| Information on preventing damage to electronic components due to electrostatic discharge | AH54.00-P-0001-01A | ||
| Use of engine no. when installing reconditioned engines and factory-new replacement engines or crankcases | AH01.10-P-0001-01A | ||
| General information on work on gasoline direct injection system | AH07.00-P-2000-01A | ||
| Note on calculation of tightening torque when using insertion or socket tools with various effective lengths | AH00.00-P-0015-01CW | ||
| Remove/install | |||
| 1 | Secure vehicle against rolling | ||
| 2 | Shift transmission to neutral and release parking brake | ||
| 3 | Deactivate easy entry/exit feature | Engine 274.9 in model 253 with code 275 (Memory Package (driver's seat, steering column and mirror)) except code M005 (Vehicles with 4MATIC/all-wheel drive) |
|
| 4 | Turn front wheels to straight-ahead position and fix steering wheel in place with holding device | Fig 3 | |
| 5 | Disconnect ground line from on-board electrical system battery | AR54.10-P-0003LW | |
| 6 | Secure vehicle on vehicle lift | AR00.60-P-0100CW | |
| 7 | Remove upper engine cover | ||
| 8 | Remove bottom engine compartment paneling | AR61.20-P-1105LW | |
| 9 | Relieve fuel pressure over diagnostic socket | AR07.03-P-1460-01MR | |
| *BA07.03-P-1003-01F | |||
| Fig 5 | |||
| 10 | Drain coolant at radiator | AR20.00-P-1142LW | |
| 11 | Drain coolant from low-temperature circuit | AR09.41-P-6834LW | |
| 12 | Remove drain screw from oil pan, drain engine oil and collect in suitable container | ||
| Notes on engine oil and filter changes | Use only approved engine oils. Engine damage will occur otherwise. |
AH18.00-P-0104-01A | |
| *BA01.45-P-1002-01T | |||
| *BF18.00-P-1001-01ZA | |||
| 13 | Remove drive shaft from transmission output flange | AR41.10-P-0050LWX | |
| 14 | Remove rear engine mounts | AR22.10-P-1160LWB | |
| 15 | Remove center shifter console and shift rod on transmission | Engine 274.9 in model 253 with transmission 716.7 except code M005 (Vehicles with 4MATIC/all-wheel drive) |
|
| AR26.60-P-0600LW | |||
| 16 | Remove hydraulic line from clutch slave cylinder | Engine 274.9 in model 253 with transmission 716.7 except code M005 (Vehicles with 4MATIC/all-wheel drive) |
|
| AR25.20-P-0150LW | |||
| 17 | Remove steering coupling from steering shaft | Do not turn steering wheel with steering coupling removed. Clock spring contact can otherwise be damaged. |
AR46.10-P-8000LW |
| 18 | Remove fuel hose (10) from engine, collect escaping fuel with suitable container and seal openings with suitable stop plug | Fig 2 | |
| Fig 4 | |||
| 19 | Remove coolant line to low-temperature circuit cooler from oil cooler | Engine 274.9 in model 253 with transmission 725.0 except code M005 (Vehicles with 4MATIC/all-wheel drive) |
AR27.55-P-1000LWX |
| Engine 274.9 in model 253 with transmission 724.2 except code M005 (Vehicles with 4MATIC/all-wheel drive) |
AR27.55-P-1000RFH | ||
| 20 | Remove oil cooler from fan unit and secure with attached lines on engine against falling down | Engine 274.9 in model 253 with transmission 725.0 except code M005 (Vehicles with 4MATIC/all-wheel drive) |
AR27.55-P-1000LWX |
| Engine 274.9 in model 253 with transmission 724.2 except code M005 (Vehicles with 4MATIC/all-wheel drive) |
AR27.55-P-1000RFH | ||
| 21 | Remove catalytic converter | AR49.10-P-5500LW | |
| 22 | Remove fan unit | AR20.40-P-5050RF | |
| 23 | Mount protective plate on radiator | ||
| WF58.50-P-0110-01A | |||
| 24 | Remove engine wiring harness from engine | Engine 274.9 in model 253.354/954 with transmission 724.2 except code M005 (Vehicles with 4MATIC/all-wheel drive) |
AR15.18-P-1000-05MRB |
| Engine 274.9 in model 253 with transmission 716.7 except code M005 (Vehicles with 4MATIC/all-wheel drive) Engine 274.9 in model 253 with transmission 725.0 except 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 | |||
| 25 | Remove ME-SFI [ME] control unit (N3/10) and secure with connected lines to engine against falling down | AR07.08-P-7008MRA | |
| 26 | Remove bracket of ME-SFI [ME] control unit (N3/10) | ||
| 27 | Remove vacuum line (1) from vacuum pump | ||
| 28 | Release and disconnect inerting system line at firewall and seal openings with suitable stop plugs | Engine 274.9 in model 253 with code 2U8 (Alternative refrigerant) except code M005 (Vehicles with 4MATIC/all-wheel drive) |
|
| AR86.10-P-0419LWE | |||
| Fig 4 | |||
| 29 | Remove bleed line (9) from cylinder head cover | Fig 1 | |
| 30 | Unclip vent line (9) and from holder and place to one side | ||
| 31 | Remove coolant hose (2) from bulkhead | AR20.20-P-7441-01RQ | |
| 32 | Remove coolant hose (6) | AR20.20-P-7441-01RQ | |
| 33 | Remove coolant hose (7) | AR20.20-P-7441-01RQ | |
| 34 | Remove coolant hose (5) from charge air cooler | AR20.20-P-7441-01RQ | |
| 35 | Remove coolant line (4) from charge air cooler | AR20.20-P-7441-01RQ | |
| 36 | Remove coolant line (4) from oil filter housing and place to one side | *BA00.10-P-1002-04A | |
| 37 | Remove coolant hose (8) from engine | AR20.20-P-7441-01RQ | |
| 38 | Release and disconnect purge line (3) at charge air cooler and seal openings with suitable stop plugs | Fig 4 | |
| 39 | Remove poly-V belt | Engine 274.9 in model 253 (except 253.354/954) except code M005 (Vehicles with 4MATIC/all-wheel drive) |
AR13.20-P-0001MRA |
| 40 | Release and disconnect electrical connection from refrigerant compressor | ||
| 41 | Remove A/C compressor from crankcase, place with attached lines to one side and secure against falling down | *BA83.55-P-1001-01M | |
| 42 | Attach load tilter to all available engine lifting lugs as well as to boom crane and slightly lift engine | ||
| 000 588 00 62 00 Load tilter | WS01.00-P-0102B | ||
When lifting, do not subject engine mounts to tension. Otherwise, engine mounts are damaged. |
|||
| 43 | Remove front engine mounts from engine supports | AR22.10-P-4330LWC | |
| 44 | Lift out the engine together with the transmission | ||
| 000 588 00 62 00 Load tilter | WS01.00-P-0102B | ||
When lifting out/in engine, do not damage any lines and hoses. Otherwise leaks and engine damage can occur. |
|||
| 45 | Install in the reverse order | ||
| Check | |||
| 46 | Check engine oil level and correct | ||
| AP18.00-P-1811MP | |||
| 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 of 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 | |
| 47 | Perform engine test run; as part of this check engine and transmission for proper operation and leak tightness |
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 |
OIL PAN
| Number | Designation | Engine 274 | |
|---|---|---|---|
| BA01.45-P-1002-01T | Drain screw to oil pan | Nm | 40 |
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 | ||
WIRING HARNESS
| Number | Designation | Model 253 | ||
|---|---|---|---|---|
| BA54.18-P-1001-02C | Nut, positive line to busbar on firewall | M6 | Nm | 8 |
| M8 | Nm | 16 | ||
REFRIGERANT COMPRESSOR
| Number | Designation | Engine 274 | |
|---|---|---|---|
| BA83.55-P-1001-01M | Screw/bolt, refrigerant compressor to timing case/crankcase/engine support | Nm | 20 |
ENGINE LUBRICATION
| Number | Designation | Engine 274.91 in model 205, 213 Engine 274.92 in model 205, 213, 238, 253 except code M005 (Vehicles with 4MATIC/all-wheel drive) | ||
|---|---|---|---|---|
| BF18.00-P-1001-01ZA | Engine oil | Oil filling capacity with oil filter | L | 7 |
| Specification | SI18.00-P-1311A | |||