64 51 001Cleaning evaporator

Special tools required:


For information on cleaning agent and rinsing again, refer to Service Information.

For information on spraying equipment, refer to Service Information Special Tools and Equipment.


When handling cleaning agent, observe following protective measures:

Wear protective rubber gloves and protective goggles.

If cleaning agent comes into contact with eyes or skin, wash immediately with lots of water.

To avoid dirtying vehicle interior:

  • Close all vents.
  • Switch heating and air conditioning unit to air recirculation function.
  • Cover carpet in working area.

Carry out the cleaning operation in a suitable washing bay as the emerging cleaning agent escapes through the drain openings in the transmission tunnel.


After completing cleaning, allow car to drip-dry for approx. 5 minutes.

Necessary preliminary tasks:
  • Remove controller for blower of heating and air conditioning system.

Install special tool  64 1 490 (spraying unit).

Attach guide (1) in place of controller with screw (2).

Tightening torque 64 11 3 AZ.


Insert spraying lance (2) through opening of guide (1).

By moving the spraying lance (2) back and forth in direction of arrow, uniformly apply the cleaning agent to the evaporator.


Set heating - A/C system to footwell ventilation and fresh-air mode. Open side windows/doors.

Start the vehicle and let the heating and air conditioning system run for approx. 5 minutes at maximum blower output.

In order to eliminate the last remnants of cleaning agent, repeat this process shortly before handover to the customer.

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