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Home >> Mercedes Benz >> 2002 >> C240 Standard >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Cooling System -- 203 Chassis >> Testing & Repair >> Pour in coolant and bleed cooling system - AR20.00-P-1142-04T

Pour in coolant and bleed cooling system - AR20.00-P-1142-04T

Fig 1: Identifying Test Cap (210 589 00 91 00)
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Fig 2: Identifying Vacuum-Type Cooling System Filler (285 589 00 21 00)
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Fig 3: Identifying Cooling System Bleeding Procedure - Shown On Model 211
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  1. SPECIAL TOOL Screw test cap (02) onto expansion reservoir (2).
  2. SPECIAL TOOL Attach the control unit (01b) to the SPECIAL TOOL test cap (02).
  3. SPECIAL TOOL Attach the venturi nozzle (01c) to the SPECIAL TOOL control unit (01b).
  4. SPECIAL TOOL Close the drain and SPECIAL TOOL feed valves (01d, 01e).
  5. SPECIAL TOOL Attach the feed hose (7) of the coolant to the SPECIAL TOOL coolant tank (01a)

    IMPORTANT So that no air is drawn in, make sure that at least 2 liters extra coolant SPECIAL TOOL are in the coolant tank (01a), as the maximum fill quantity of the coolant system.

  6. SPECIAL TOOL Guide the waste air hose (8) into an empty container (9)
  7. Connect the compressed-air hose (10) to the SPECIAL TOOL venturi nozzle (01c) and apply pressure.
  8. SPECIAL TOOL Open the drain valve (01d).

    IMPORTANT A vacuum is created in the cooling system.

  9. SPECIAL TOOL Open the feed valve (01e) until the SPECIAL TOOL feed hose (7) has filled with coolant.
  10. SPECIAL TOOL Close the drain valve (01d) if the display of the SPECIAL TOOL control unit (01b) is in the green area.
  11. Detach the compressed air hose (10) from the SPECIAL TOOL venturi nozzle (01c) and monitor if the vacuum remains stable for 30 seconds.

    IMPORTANT If not, check the hoses and connections. Tighten or replace them if necessary and create a vacuum again.

  12. SPECIAL TOOL Open the feed valve (01e).

    IMPORTANT The cooling system is filled.

  13. SPECIAL TOOL Open the drain valve (01d) if coolant is no longer suctioned.
  14. SPECIAL TOOL Remove the control unit (01b) along with all the connections and SPECIAL TOOL the test cap (02).
  15. Correct the coolant level up to the bottom edge of the filler neck of the expansion reservoir (2)