Inspect cooling system for leaks - AR20.00-P-1010MCC
ENGINE 132.9, 660.9 in MODEL 451.3/4
ENGINE 780.993 in MODEL 451.390/392/490/492
| Risk of death caused by vehicle slipping or toppling off of the lifting platform. | Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer. | AS00.00-Z-0010-01A | |
| 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 | |
| Notes on coolant | AH20.00-N-2080-01A | ||
| Information on preventing damage to electronic components due to electrostatic discharge | AH54.00-P-0001-01A | ||
| Check | |||
| 1 | Remove maintenance flap | ||
| 2 | Turn cooling system cap (1) on expansion reservoir (2) a half turn counterclockwise, relieve the overpressure and then unscrew the cooling system cap (1) | ||
| 3 | Check coolant level in expansion reservoir (2), correct if necessary | ||
| Coolant specifications | Coolant (Specification 310.1). See https://bevo.mercedes-benz.com/index.php?language_id=1 | ||
| Anticorrosion/antifreeze agents (Sheet 325.0) | Anticorrosion/antifreeze agents (Specification 325.0). See https://bevo.mercedes-benz.com/index.php?language_id=1 | ||
| 4 | Attach pressure pump on expansion reservoir (2) | Figure | |
| 5 | Apply a pressure of a max. 1.6 bar to the cooling system | Figure | |
| 6 | Remove interior flap above engine | If a pressure drop was established in the cooling system. | AR88.40-P-1100-03MCC |
| 7 | Raise vehicle with vehicle lift | If a pressure drop was established in the cooling system. | |
| 8 | Remove underfloor paneling | If a pressure drop was established in the cooling system. | |
| 9 | Check all components of cooling system for leaktightness; establish coolant loss and remove it | If a pressure drop was established in the cooling system. | |
| 10 | Lower vehicle with vehicle lift | If a pressure drop was established in the cooling system. | |
| 11 | Disconnect pressure pump on expansion reservoir (2) and check coolant level in expansion reservoir (2); correct if necessary | After removal of the leakage in the cooling system. | |
| Coolant specifications | Coolant (Specification 310.1). See https://bevo.mercedes-benz.com/index.php?language_id=1 | ||
| Anticorrosion/antifreeze agents (Sheet 325.0) | Anticorrosion/antifreeze agents (Specification 325.0). See https://bevo.mercedes-benz.com/index.php?language_id=1 | ||
| Figure | |||
| 12 | Attach pressure pump to expansion reservoir (2) and apply a pressure of a maximum of 1.6 bar again to the cooling system | After removal of the leakage in the cooling system. |
Figure |
| 13 | Raise vehicle with vehicle lift | After removal of the leakage in the cooling system. | |
| 14 | Install underfloor paneling | After removal of the leakage in the cooling system. | |
| 15 | Lower vehicle with vehicle lift | After removal of the leakage in the cooling system. | |
| 16 | Install interior flap above engine | After removal of the leakage in the cooling system. | AR88.40-P-1100-03MCC |
| 17 | Disconnect pressure pump on expansion reservoir (2) | Figure | |
| 18 | Seal expansion reservoir (2) with cap (1) | ||
| 19 | Install maintenance flap |