The Mercedes 380 420 450 500 560 SL Chain Guide A1170501816 is a high-quality guide rail specifically designed for Mercedes engines. Manufactured by SWAG, this chain guide is a crucial component in ensuring proper engine timing and performance. With reference OE/OEM numbers such as A1170501816 and 1170501816, this guide rail is compatible with various Mercedes models, providing a reliable and precise fit for your vehicle. Whether you are looking to replace a damaged chain guide or upgrade to a more durable one, this product is a dependable choice for your Mercedes engine.