The DELPHI TC2137 Rear Left Upper Control Arm with Ball Joint Assembly is engineered to provide superior performance and durability for Mercedes-Benz M-Class vehicles, including models ML320, ML430, ML55 AMG, ML500, and ML350 produced between 1998 and 2005. This assembly is designed to replace the original equipment (OE) part numbers A163 352 0001 and A163 352 0401, ensuring a precise fit and reliable operation. Constructed from high-strength aluminum, the control arm measures 320mm in length, 300mm in width, and 95mm in height, offering a lightweight yet robust solution for your vehicle's suspension system. The integrated ball joint is press-fitted and pre-greased, facilitating smooth steering and suspension movements. The assembly includes rubber bushings and a black chloroprene rubber dust boot, providing effective protection against contaminants and enhancing the longevity of the component. Delphi's commitment to quality is evident in the extensive testing each control arm undergoes, including exposure to temperatures ranging from -40°C to over 120°C and 720 hours of salt spray, ensuring exceptional durability and performance under various driving conditions. By choosing the DELPHI TC2137 control arm, fleet operators can expect improved vehicle handling, reduced maintenance costs, and enhanced overall performance, contributing to the efficient operation of their fleet.