Remove/install fan unit - AR20.40-P-5050LF
ENGINE 157, 276, 278 in MODEL 217
ENGINE 157, 276.8/9, 278, 642 in MODEL 222
Shown on vehicle with engine 278 without radiator shutters
Fig 1: Fan Unit Remove/Install Components - Shown On Vehicle With Engine 278 Without Radiator Shutters
Shown on engine 276.8
| 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 | |
| Remove/install | |||
| 1 | Remove upper engine cover | ||
| 2 | Drain off coolant | Engine 276.8 in model 217, 222 | AR20.00-P-1142LF |
| 3 | Detach vent line (5) from engine radiator | Engine 276.8 in model 217, 222 | |
| 4.1 | Remove engine air intake ducts (1) upstream of air filter | Engine 157, 276 (except 276.9), 278, 642 in model 222 Engine 157, 276, 278 in model 217 |
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| 4.2 | Remove right engine air intake duct (1) upstream of air filter | Engine 276.9 in model 222 | |
| 5 | Remove center front reinforcement (3) | Engine 157, 276.9, 278 in model 222 Engine 157, 278 in model 217 |
AR62.30-P-1570LF |
| 6 | Unclip coolant lines from fan unit (2) if necessary | Engine 157, 276.9, 278 in model 222 Engine 157, 278 in model 217 |
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| 7 | Release and disconnect electrical connection (4) on fan unit (2) | ||
| 8 | Unclip electrical line on left side from fan unit (2) | Engine 642 in model 222 | |
| 9 | Release and disconnect electrical connection for radiator shutters actuator motor if necessary | Engine 276.9 in model 222 | |
| 10 | Remove radiator shutters actuator motor on fan unit (2) | Engine 642 in model 222 with code M005 (4MATIC) |
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| 11 | Unclip electrical line for radiator shutters actuator motor from fan unit (2) | Engine 642 in model 222 with code M005 (4MATIC) |
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| 12 | Unclip A/T oil cooler at fan unit (2) and place with attached oil cooling lines and coolant hoses to one side | Engine 157 in model 217 with transmission 722.93 Engine 157 in model 222 with transmission 722.9 Engine 276 in model 222 with transmission 724.2 Engine 276 in model 222 with transmission 725.0 Engine 276.8 in model 222 with transmission 722.9 Engine 278 in model 217 with transmission 722.90 Engine 278 in model 217, 222 with transmission 725.0 Engine 278 in model 222 with transmission 722.9 Engine 642 in model 222 with transmission 722.9 Do not bend or kink oil cooling lines. Leaks and damage can occur otherwise. |
AR27.55-P-1000LF |
| 13 | Unscrew cap on coolant expansion reservoir | Engine 276.8, 278 in model 217 Engine 276.8, 278 in model 222 |
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| 14 | Remove screw/bolt of upper coolant return line at fan unit (2) | Engine 157, 276.8, 278 in model 217 Engine 157, 276.8, 278 in model 222 |
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| 15 | Push clamps on the left and right on fan unit (2) to the rear | ||
| 16 | Remove fan unit (2) upwards | ||
| 17 | Install in the reverse order | ||
| Check | |||
| 18 | Pour in coolant and ventilate engine cooling system | Engine 276.8 in model 217, 222 | AR20.00-P-1142LF |