Genuine Mercedes w163 ML Windshield Washer Fluid Reservoir Bottle Container Tank Washer Fluid Reservoir (Windshield) Mercedes part# 163 860 16 60, Genuine Mercedes part. NOTE: if you do not have headlight washers (code 600), then you will need two plugs for this - email us. Installation Tip: The Fuse Box must be removed to make room for the new Reservoir. The Fuse Box can then be reinstalled in it's original position.