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.

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:

Partially release transmission underbody protection (6) for cleaning agent drain:

Release screws (2 ... 4) in rear area and push heat shield (5) aside.

Connect special tool 64 1 480 (spraying lance) with spraying apparatus.

Insert spraying lance (1) through opening (2) toward fresh-air duct.

By moving the spraying lance (1) back and forth in direction of arrow, uniformly apply the cleaning agent to the evaporator.


After rinsing with water, blow out evaporator with spraying lance and only air for approx. 5 minutes. Pay special attention to the centre of the evaporator to dry the blower motor behind it.

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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