Hope that someone here can help me come up with a part number for the heated vinyl hose assembly running from the reservoir pump to the two windshield nozzles. A pair of conductors are visible inside the wall of the washer tubing -apparently to heat the hose. I cannot find this type hose assembly on any of the Mercedes Parts websites. The only thing I have found is a generic? Vinyl nylon reinforced hose which is cut to length. Can someone explain this please? Thanks for any assistance.