Bleeding The Clutch System

Information 

The PIWIS Tester II 9818  instructions take precedence and in the event of a discrepancy these are the instructions that must be followed. Deviations may occur with later software versions.

Information 

• When changing the hydraulic fluid, the clutch system does not have to be bled using PIWIS Tester II  . → 470855 REPLACING BRAKE FLUID FOR THE CLUTCH SYSTEM (HYBRID)
• The bleeder valve does not have to be opened in order to bleed the system  .
• If parts/components of the clutch system are removed or replaced, the clutch system must be bled using PIWIS Tester II and clutch adaptation must be performed using PIWIS Tester II  .

1. Brake filling and bleeding device ATE WE 1096  must be connected.
2. Fill the brake hydraulic system reservoir to above the MAX  marking.
3. PIWIS Tester II 9818  must then be connected and switched on.
   1. 3.1. [Select DIAGNOSTICS].
   2. 3.2. Select vehicle model.
   3. 3.3. [Digital engine electronics (DME)] must now be selected. Then select [MAINTENANCE/REPAIRS] and press [F12] to confirm.
   4. 3.4. You now have the option of creating a Vehicle Analysis Log (VAL).
   5. 3.5. [CLUTCH ACTUATOR AND DECOUPLER] must now be selected. Then press [F12] to confirm.
   6. 3.6. Read instructions relating to HV batteries!
   7. 3.7. [Bleed hydraulic system] must now be selected. Then press [F12] to confirm.
4. If parts of the hydraulic system were replaced, the "Hydraulic system air/leak test" must be carried out. PIWIS Tester II 9818  must be connected and switched on until it is ready for operation.
   1. 4.1. [Select DIAGNOSTICS].
   2. 4.2. Select vehicle model.
   3. 4.3. [DME] must now be selected. Then select [MAINTENANCE/REPAIRS] and press [F12] to confirm.
   4. 4.4. You now have the option of creating a Vehicle Analysis Log (VAL).
   5. 4.5. [CLUTCH ACTUATOR AND DECOUPLER] must now be selected. Then press [F12] to confirm.
   6. 4.6. Read instructions relating to HV batteries!
   7. 4.7. [Check hydraulic system for air/leaks] must now be selected. Then press [F12] to confirm.
5. Perform clutch adaptation.

   PIWIS Tester II 9818  must be connected and switched on until it is ready for operation.

   1. 5.1. [Select DIAGNOSTICS].
   2. 5.2. Select vehicle model.
   3. 5.3. [DME] must now be selected. Then select [MAINTENANCE/REPAIRS] and press [F12] to confirm.
   4. 5.4. You now have the option of creating a Vehicle Analysis Log (VAL).
   5. 5.5. [CLUTCH ACTUATOR AND DECOUPLER] must now be selected. Then press [F12] to confirm.
   6. 5.6. Read instructions relating to HV batteries!
   7. 5.7. [Clutch adaptation] must be selected. Then press [F12] to confirm.
6. Fill the brake hydraulic system reservoir to the MAX  marking.