Inspecting cooling system for leaks - AR20.00-P-1010GZC (ML350, ML550, GL450, GL550)
WARNING: This page does not describe the selected car, but rather 28 other vehicles, including the 2012 Mercedes-Benz GL550, 2012 Mercedes-Benz GL450, 2011 Mercedes-Benz ML63, 2011 Mercedes-Benz ML550, and 2011 Mercedes-Benz ML350. However, it is still accessible from the selected car via links, so may be relevant.
ENGINES 272, 273 in MODEL 164, 251
Shown on model 251 with engine 272
| Checking | |||
|---|---|---|---|
| Risk of injury to skin and eyes caused by scalding from contact with hot coolant spray. Risk of poisoning caused by 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 | |
| 1 | Unscrew cap for coolant expansion reservoir (1) | ||
| 2 | Check coolant level and antifreeze content of coolant and correct if necessary | Drain coolant, fill. Model 164, 251 |
AR20.00-P-1142GZC |
| Model 463 | AR20.00-P-1142GX | ||
| Coolant specifications | Sheet 310.1 | BB00.40-P-0310-01A | |
| Anticorrosion/antifreeze agents (Sheet 325.0) | Sheet 325.0 | BB00.40-P-0325-00A | |
| 3 | Screw test cap (2) onto coolant expansion reservoir (1). | Fig 2 | |
| 4 | Connect pressure pump (3) at tester cap (2) | Fig 3 | |
| 5 | Apply test pressure to cooling system | *BE20.30-P-1005-01A | |
| 6 | Check hose clamps for condition and seating | ||
| 7 | Check coolant hoses and heater hoses and their connecting points for condition and coolant loss | ||
| 8 | Unscrew test cap (2) at coolant expansion reservoir (1). | ||
| 9 | Remove pressure pump (3) from test cap (2) | ||
| 10 | Screw cap onto coolant expansion reservoir (1) |
RADIATOR OR EXPANSION RESERVOIR CAP
| Number | Designation | 2-stage cap | |
|---|---|---|---|
| BE20.30-P-1005-01A | Test pressure for pressure-testing cooling system | bar gage | 1.4 |