Inspect cooling system for leaks - AR20.00-P-1010MEV
ENGINE 780.009 in MODEL 451.391/491 Electric motor coolant circuit
| Risk of death when touching components on vehicles with high-voltage on-board electrical system | Do not touch components and open lines of the high-voltage on-board electrical system. Persons who wear electronic implants (e.g. cardiac pacemakers), must not carry out any work on high-voltage on-board electrical systems. | AS54.00-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 | |
| 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 interior flap above engine | AR88.40-P-1100-03MCC | |
| 2 | Turn cooling system cap (1) on radiator (2) a half turn counterclockwise, relieve the overpressure and then unscrew the cap (1) | ||
| 3 | Check coolant level in cooler (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 | Connect pressure pump to radiator (2) | Figure | |
| 5 | Apply a pressure of a max. 1.6 bar to the cooling system | ||
| 6 | Observe pressure gauge for the pressure pump for a pressure drop in the cooling system | ||
| 7 | Check all components of cooling system for leaks; establish coolant loss | ||
| 8 | Remove pressure in cooling system at pressure pump | ||
| 9 | Connect pressure pump to radiator (2) | Figure | |
| 10 | Seal cooler (2) with cap (1) | ||
| 11 | Install interior flap above engine | AR88.40-P-1100-03MCC |