Carrying out the bleeding process for the low temperature circuit - AR20.00-P-1145-03R

Fig 1: Identifying Connections Of Venturi Nozzle With Vacuum Box

Courtesy of MERCEDES-BENZ USA

Connect venturi nozzle (6) with vacuum box (1) connection (U) to connection (G).
Generate vacuum in vacuum box (1) - open valve (H).

3.1 Model 215, 220, 230, 240:
Actuate circulation pump for low-temperature circuit. Switch on switch on relay slot.
3.2 Model 216, 221:
Actuate circulation pump for low temperature circuit via STAR DIAGNOSIS.
4 Generate vacuum in low temperature circuit - open valves (C, D) and wait for 15 seconds.
5 Start venting process - open valve (O) for at least 5 minutes.
The air in the coolant is removed by flushing the low temperature circuit.
6 Observe coolant flow in the area of the Y-fitting (arrow) during the flushing process. If the coolant is flowing free of bubbles after 5 minutes then the low temperature circuit has been bled.

Fig 2: Flushing Low Temperature Circuit
Courtesy of MERCEDES-BENZ USA
7 Stop coolant flow by first closing valve (O), switching off the switch for the circulation pump, actuating STAR DIAGNOSIS and then closing valves (C, D).
8 Remove vacuum - disconnect compressed air (Z) from venturi nozzle (6) connection (M).
9 Decouple connection (L) to test cap.

Fig 3: View Of Bleeding Process For Low Temperature Circuit
Courtesy of MERCEDES-BENZ USA