I think I found it. It's part # 310 on this diagram. The actual part number is A1268201111 EPC says "Heated Screen Washer System".I have found that the car ( SLK 200 year 2000) I recently purchased is missing the air inlet printed circuit board. I have found it on the WIS system document number AR83.25-P-1401G, but cannot identify it on the EPC system. Anybody help?