The Mercedes 190E 2.3 16V Cosworth Chain Guide is a genuine part made in Germany by Mercedes. This guide rail is designed to ensure proper timing chain function in the engine, and is a new old stock (NOS) item. The reference OE/OEM numbers A1020520716 and A1020520616 guarantee its authenticity and compatibility with the specified Mercedes models. Ideal for engine maintenance and repair, this chain guide offers quality and reliability for your vehicle.