Check Low-Temperature Circuit For Leaktightness - AR09.41-P-1011SB
Engine 256 in model 223
with code B01 (48V technology)
| Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant. | Do not open cooling system unless coolant temperature is below 90°C. Open cap slowly and release the overpressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses. |
AS20.00-Z-0001-01A | |
| Notice | Notes on coolant | AH20.00-P-2080-01KOA | |
| Notes on coolant level | AH20.00-P-1142-01CW | ||
| Remove | |||
| 1 | Slowly unscrew cap (1) at coolant expansion reservoir (2) and release overpressure if necessary. | ||
| 2 | Check coolant level and antifreeze content of coolant. | *BF20.00-P-1001-02MA | |
| 3 | Screw tester cap (3) onto coolant expansion reservoir (2). | Fig 1 | |
| 4 | Connect pressure pump (4) at tester cap (3). | Fig 1 | |
| Fig 2 | |||
| Check | |||
| 5 | Apply test pressure to low-temperature circuit for 2 min. | Do not exceed the specified test pressure. Otherwise the cooling system can get damaged. |
*BE20.30-P-1005-01A |
| 6 | Perform visual check of coolant-carrying component parts and connecting points for condition and coolant loss. | Where pressure loss is detected. | |
| Install | |||
| 7 | Drain off overpressure via valve at pressure pump (4). | Fig 2 | |
| 8 | Unscrew pressure pump (4) from tester cap (3). | Fig 1 | |
| Fig 2 | |||
| 9 | Unscrew tester cap (3) from coolant expansion reservoir (2). | Fig 1 | |
| 10 | Check coolant level and antifreeze content of coolant; correct if necessary. | *BF20.00-P-1001-02MA | |
| 11 | Screw cap (1) onto coolant expansion reservoir (2). |
RADIATOR OR EXPANSION RESERVOIR CAP
| Number | Designation | 2-stage latch cover | ||
|---|---|---|---|---|
| BE20.30-P-1005-01A | Test pressure for pressure-testing the engine cooling system | Overpressure | bar | 1, 4 |
COOLING SYSTEM
| Number | Designation | Model 223 with engine 256 except code ME10 (Hybrid vehicle) | Model 223 with engine 256 with code ME10 (Hybrid vehicle) | |||
|---|---|---|---|---|---|---|
| BF20.00-P-1001-02MA | Cooling system | Workshop replacement amount | Main circuit | Liter | ≈17 | ≈17 |
| Low-temperature circuit | Liter | ≈2, 3 | ≈6, 8 | |||
| Antifreeze/water | to -37°C | % | 50/50 | 50/50 | ||
| Specifications | BB00.40-P-0310-01A | BB00.40-P-0310-01A | ||||
| Specifications | BB00.40-P-0325-06A | BB00.40-P-0325-06A | ||||
| Specifications | BB00.40-P-0326-06A | BB00.40-P-0326-06A | ||||
| as from -38°C | % | 55/45 | 55/45 | |||