Remove/install engine with front axle carrier - AR01.10-P-2500RKB
ENGINE 157, 278 in MODEL 231
Shown on model 231 with engine 278
Fig 1: Engine With Front Axle Carrier Remove/Install Components - Shown On Model 231 With Engine 278 (1 Of 4)
Fig 2: Engine With Front Axle Carrier Remove/Install Components - Shown On Model 231 With Engine 278 (2 Of 4)
Fig 3: Engine With Front Axle Carrier Remove/Install Component - Shown On Model 231 With Engine 278 (3 Of 4)
Fig 4: Engine With Front Axle Carrier Remove/Install Component - Shown On Model 231 With Engine 278 (4 Of 4)
| 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 to skin and eyes suffering scalding from contact with hot coolant spray. 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. Wear protective gloves, protective clothing and safety glasses. |
AS20.00-Z-0001-01A | |
| Risk of injury to skin or eyes from hydraulic fluid spraying out under pressure. Risk of poisoning from swallowing hydraulic fluid. | Depressurize hydraulic system completely before starting any work on it. Wear protective clothing and safety glasses. | AS00.00-Z-0013-01A | |
| Notes on coolant | AH20.00-N-2080-01A | ||
| Notes on self-locking nuts and bolts | AH00.00-N-0001-01A | ||
| Notes on Active Body Control suspension | AH32.50-P-0001-01N | ||
| Remove/install | |||
| 1 | Switch off easy entry/exit | Depending on the version, the steering wheel and possibly also the driver's seat move to a different position when, for example, the driver door is opened or closed. The driver's seat may be damaged when the brake pedal jack is installed. |
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| 2 | Turn front wheels to straight-ahead position and secure steering wheel with holding device | The steering wheel must not be turned when detaching steering coupling. The steering wheel clock spring contact can be destroyed otherwise. |
Figure |
| 3 | Set DIRECT SELECT gear selector switch to position "N" and release parking brake | ||
| 4 | Disconnect battery ground line | AR54.10-P-0003RK | |
| 5 | Secure vehicle on vehicle lift | AR00.60-P-0100TX | |
| 6 | Remove lower engine compartment paneling | AR61.20-P-1105RK | |
| 7 | Remove underfloor paneling | AR61.30-P-1001RK | |
| 8 | Drain coolant at radiator | AR20.00-P-1142RK | |
| 9 | Remove engine covers (1) | ||
| 10 | Remove left and right engine air intake duct (2) | ||
| 11 | Remove left and right air filter housing (3) | ||
| 12 | Remove insulation (4) on left and right rail | ||
| 13 | Suction off refrigerant out of air conditioning | Model 231 with engine 157, 278 except code 2U8 (Refrigerant R-1234yf) |
AR83.30-P-1760NKB |
| Model 231 with engine 157, 278 with code 2U8 (Refrigerant R-1234yf) |
AR83.30-P-1760YF | ||
| 14 | Extract oil from ABC expansion reservoir | Engine 157, 278 in model 231 with code 487 (Active Body Control (ABC)) |
Fig 6 |
| 15 | Disconnect refrigerant line (5) at engine compartment connecting point and close off openings | Model 231 with engine 157, 278 except code 2U8 (Refrigerant R-1234yf) Model 231 with engine 157, 278 with code 2U8 (Refrigerant R-1234yf) |
AR83.30-P-7816RK |
| Figure | |||
| 16 | Remove purge line (6) at purging switchover valve (Y58/1) | ||
| 17 | Remove vacuum line on intake manifold and vacuum pump and place to one side | AR43.05-P-1320RKB | |
| 18 | Remove center bulkhead (7) | ||
| 19 | Disconnect engine wiring harness on the vehicle side | AR01.00-P-2410-02RKB | |
| 20 | Disconnect electrical connections (30) from electromechanical controller unit for electric power steering (A91) and place cable duct (31) to one side | ||
| 21 | Remove electrical line on intelligent servo module for DIRECT SELECT and unclip on transmission | Engine 157 in model 231 with transmission 722.9 Engine 278 in model 231 with transmission 722.9 |
AR27.19-P-0550RK |
| 22 | Disconnect electrical line on oil pump electric motor and unclip on transmission | Model 231 with engine 157 with transmission 722.9 Model 231 with engine 278 with transmission 722.9 |
AR27.30-P-0651RK |
| 23 | Remove heat shield from transmission | Engine 157 in model 231 with transmission 722.9 Engine 278 in model 231 with transmission 722.9 |
AR27.40-P-0700-01RK |
| *BA27.40-P-1019-01A | |||
| *BA27.40-P-1014-01A | |||
| 24 | Disconnect electrical connection from transmission control | ||
| 25 | Remove catalytic converters | AR49.10-P-7100RK | |
| 26 | Remove oil cooling lines for transmission at cooler and close off openings | AR27.10-P-0501-03SX | |
| Figure | |||
| 27 | Remove oil lines for oil cooling system on oil cooler and close off openings | Engine 157 in model 231 |
Figure |
| 28 | Remove circulation pump of charge air cooler (M44) with the connected lines from front axle carrier and place to one side | ||
| 29 | Disconnect lower steering shaft at steering coupling | AR46.10-P-8000RK | |
| 30 | Remove bracket and rpm sensor at steering knuckle and spring control arm | AR42.30-P-0712RK | |
| 31 | Remove brake caliper on the right and left from brake caliper support | AR42.10-P-0070RK | |
| 32 | Remove steering knuckle from upper transverse control arms | AR33.20-P-0500RK | |
| 33 | Remove fender liners in left and right fenders | AR88.10-P-1300RK | |
| 34.1 | Drain off hydraulic fluid in the front suspension struts over the bleed screws | Engine 157, 278 in model 231.### ## up to 021273 with code 487 (Active Body Control (ABC)) |
AR32.50-P-0001-01N |
| *BA32.50-P-1001-02B | |||
| 34.2 | Vent pressure in the ABC system using the diagnostic system | Engine 157, 278 in model 231.### ## as of 021274 with code 487 (Active Body Control (ABC)) |
AD00.00-P-2000-04A |
| AR32.50-P-0001-01LF | |||
| 35 | Remove suspension struts from spring control arms | AR32.25-P-1017RK | |
| 36 | Disconnect front left ABC hydraulic line at connecting point and remove at longitudinal member | Engine 157, 278 in model 231 with code 487 (Active Body Control (ABC)) |
|
| 37 | Disconnect feed hose (8) for the ABC hydraulic pump at connecting point on the cylinder head cover | Engine 157, 278 in model 231 with code 487 (Active Body Control (ABC)) |
|
| 38 | Remove Active Body Control (ABC) pressure line (9) from hydraulic pump ABC to valve unit at hydraulic pump ABC | Engine 157, 278 in model 231 with code 487 (Active Body Control (ABC)) |
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| 39 | Disconnect bleed line (10) at connecting point | ||
| 40 | Remove coolant hose (11)) at heater shutoff valve (12) | ||
| 41 | Remove coolant hose (13) at coolant pump and place to one side | AR20.20-P-7441-01RQ | |
| 42 | Remove coolant hoses (14, 15) at coolant lines (16, 17) for charge air cooler | ||
| 43 | Remove coolant hose (18) from thermostat housing | AR20.20-P-7441-01RQ | |
| 44 | Remove refrigerant line on condenser and close off opening | AR83.30-P-6540RK | |
| Figure | |||
| 45 | Relieve fuel pressure over diagnostic socket | AR07.03-P-1460-01VA | |
| *BA07.03-P-1007-01E | |||
| Figure | |||
| 46 | Remove fuel line (19) from fuel distributor (20) | *BA07.03-P-1001-01E | |
| 47 | Secure radiator (21) against falling down | ||
| 48 | Support front axle carrier (23) with a lifting platform and secure | ||
| 000 588 03 62 00 Lifting platform | WS01.00-P-0091A | ||
| 49 | Remove rear engine mount | AR22.10-P-1160RKA | |
| 50 | Remove bracket (26) for the lower engine compartment paneling | ||
| 51 | Remove drive shaft (27) from transmission output flange | AR41.10-P-0050RK | |
| 52 | Remove screw/bolts (28) | *BA33.10-P-1002-01O | |
| 53 | Remove screw/bolts (29) | *BA33.10-P-1001-01O | |
| 54 | Lower engine transmission unit with front axle carrier (23) | ||
| 55 | Install in the reverse order | ||
| Check | |||
| 56 | Check cooling system for leaktightness | AR20.00-P-1010RK | |
| 57 | Fill and bleed active body control (ABC) | Engine 157, 278 in model 231 with code 487 (Active Body Control (ABC)) |
AR32.50-P-0021SX |
| 58 | Correct transmission oil level | AR27.00-P-0270W | |
| 59 | Perform wheel alignment check | AR40.20-P-0200R | |
| 60 | Read out fault memory using the diagnostic system and clear if necessary | ||
| AD00.00-P-2000-04A | |||
| 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 | |
| 61 | Carry out an engine test run, checking the engine for proper operation and leaktightness |
INJECTION NOZZLES, INJECTION VALVES, LINES
| Number | Designation | Engine 157 | Engine 278 | |
|---|---|---|---|---|
| BA07.03-P-1001-01E | Union nut, fuel line to fuel distributor | Nm | 22 | 22 |
INJECTION NOZZLES, INJECTION VALVES, LINES
| Number | Designation | Engine 157 | Engine 278 | ||
|---|---|---|---|---|---|
| BA07.03-P-1007-01E | Protective cap on service valve | Plastic | Nm | 2 | 2 |
| Metal | Nm | 15 | 15 | ||
HOUSING
| Number | Designation | Transmission 722.9 | |
|---|---|---|---|
| BA27.40-P-1014-01A | Bolt, heat shield to transmission housing | Nm | 9 |
HOUSING
| Number | Designation | Transmission 722.9 | |
|---|---|---|---|
| BA27.40-P-1019-01A | Bolt, leaf spring to transmission housing | Nm | 5 |
ACTIVE BODY CONTROL, LINES
| Number | Designation | Model 231 with code 487 | ||
|---|---|---|---|---|
| BA32.50-P-1001-02B | Bleed screw on soldered fitting in hydraulic line | M10 x 1 | Nm | 20 |
FRONT AXLE CARRIER
| Number | Designation | Model 231 | ||
|---|---|---|---|---|
| BA33.10-P-1001-01O | Bolt, front axle carrier to longitudinal member | Front | Nm | 140 |
| Center | Nm | 70 | ||
| Rear | Nm | 50 | ||
FRONT AXLE CARRIER
| Number | Designation | Model 231 | |
|---|---|---|---|
| BA33.10-P-1002-01O | Bolt, front axle carrier to cooler mounting console | Nm | 20 |