64 51 001Cleaning evaporator

Special tools required:


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 air 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.


For more notes on the cleaning agent, see Service Information.

For more information on the spraying equipment, see Service Information on Special Tools/Equipment.


Ensure that the cleaning agent can flow away freely at the drain openings. If necessary, remove rear underbody protection.

Remove limit-position switch for air conditioning blower.

Fasten adapter for spraying lance 64 1 457 using screws (1) of limit-position switch for air conditioning blower.

Close opening (B) with seal plug for adapter 64 1 458 .

Insert spraying lance 64 1 451 in direction of arrow and fasten with mounting for spraying lance 64 1 456 .
Insert travel limiter (1) into notch (2) of spraying lance 64 1 451 and turn approx. 45°.

Connect spraying lance 64 1 451 with spraying equipment.

By moving the spraying lance 64 1 451 back and forth, uniformly apply the cleaning agent to the evaporator.

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


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

Set heating and air-conditioning unit to footwell ventilation and fresh air mode. Open windows or doors.

Start the vehicle and let the heating and air-conditioning unit run for at least 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.

Sponsored links