Check low-temperature circuit cooling system for leaks - AR09.41-P-1010MTA
ENGINE 133 in MODEL 117, 156, 176
| 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 | |||
| 1 | Switch on ignition | ||
| 2 | Unscrew cap (1) on coolant expansion reservoir (2) | ||
| 3 | Check coolant level and antifreeze content coolant | ||
| Notes on coolant level | AH20.00-P-1142-01CW | ||
| If antifreeze content of coolant is too low, either antifreeze protection must be added or the coolant must be replaced. ↓ Drain/fill low-temperature circuit coolant |
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| AR20.00-P-1144MTA | |||
| 4 | Screw on tester cap (3) at coolant expansion reservoir (2) | Fig 3 | |
| 5 | Connect pressure pump (4) at tester cap (3) | Fig 2 | |
| 6 | Apply test pressure to cooling system | Test pressure for pressure-testing the engine cooling system | *BE20.30-P-1005-01A |
| Check | |||
| 7 | Perform a visual inspection on the components carrying coolant | Check condition and seating of the Henn coupling; replace catch springs if required in order to avoid coolant loss. ↓ Open and close coupling |
|
| AR09.41-P-1311-01AL | |||
| Install | |||
| 8 | Actuate pressure relief button on the pressure pump (4) and relieve test pressure in cooling system | ||
| 9 | Detach pressure pump (4) from tester cap (3) | ||
| 10 | Unscrew on tester cap (3) at coolant expansion reservoir (2) | ||
| 11 | Switch off ignition | ||
| 12 | Check coolant level | ||
| Notes on coolant level | AH20.00-P-1142-01CW | ||
| *BF20.00-P-1001-02ZA | |||
| 13 | Screw cap (1) onto coolant expansion reservoir (2) |
RADIATOR OR EXPANSION RESERVOIR CAP
| Number | Designation | 1-stage cover latch | 2-stage cover latch | ||
|---|---|---|---|---|---|
| BE20.30-P-1005-01A | Test pressure for pressure-testing the engine cooling system | Overpressure | bar | 1, 4 | 1, 4 |
COOLING SYSTEM
| Number | Designation | Engine 133 | |||
|---|---|---|---|---|---|
| BF20.00-P-1001-02ZA | Cooling system | Workshop replacement quantity | Main circuit | Liter | ≈ 7, 5 |
| Low temperature circuit | Liter | ≈ 3, 5 | |||
| Antifreeze/water | Up to -37 °C | % | 50/50 | ||
| As of -38 °C | % | 55/45 | |||
| Specitications | Coolant (Specification 310.1). See https://bevo.mercedes-benz.com/index.php?language_id=1 | ||||
| Specitications | Anticorrosion/antifreeze agents (Specification 325.0). See https://bevo.mercedes-benz.com/index.php?language_id=1 | ||||
| Specitications | Premixed coolant (Specification 326.0). See https://bevo.mercedes-benz.com/index.php?language_id=1 | ||||