The Mercedes R107 W126 SL Tensioner Rail Genuine A1170501616 M117 Swag Lining is a high-quality guide rail specifically designed for Mercedes vehicles. Manufactured by the original equipment manufacturer (OEM), this part carries the manufacturer part number A1170501616 and reference OE/OEM numbers 1170501616, 1170501416, and 1170520083. Perfect for ensuring proper tension and alignment in the timing components of engines, this genuine Mercedes tensioner rail guarantees reliable performance and longevity for your vehicle.