Delphi TC8859 Suspension Control Arm and Ball Joint Assembly - Front Left Upper

Front Left Upper Control Arm Assembly

Delphi TC8859 is a front left upper suspension control arm and ball joint assembly for select Mercedes-Benz SUVs. It is built for the front left upper position and supports precise suspension geometry on applications such as the GLE350, GLE450, GLS450, and Maybach GLS600.

Key Features

• Front left upper suspension control arm and ball joint assembly
• OE-focused dimensional and material analysis for proper part-to-vehicle match
• Tested for temperature extremes below -40 C and above 120 C
• Exposed to 720 hours of salt spray testing for corrosion resistance validation
• Direct replacement for select Mercedes-Benz front suspension applications
• Part number: TC8859

Detailed Description

Delphi applies OE engineering experience to its aftermarket steering and suspension portfolio, and TC8859 follows that approach with attention to fit, material selection, and durability. This front left upper control arm assembly is listed for 2020-2024 Mercedes-Benz GLE350, 2020-2024 Mercedes-Benz GLE450, 2022-2024 Mercedes-Benz GLE450 SUV, 2024 Mercedes-Benz GLE450e, 2021-2024 Mercedes-Benz GLE53 AMG, 2021-2024 Mercedes-Benz GLE53 AMG SUV, 2020-2024 Mercedes-Benz GLE580, 2021-2024 Mercedes-Benz GLE63 AMG S, 2021-2024 Mercedes-Benz GLE63 AMG S SUV, 2020-2024 Mercedes-Benz GLS450, 2020-2024 Mercedes-Benz GLS580, and 2021-2024 Mercedes-Benz Maybach GLS600. If you are searching for a Delphi TC8859 front left upper control arm for Mercedes-Benz GLE or GLS models, this part matches the listed applications directly.

What It Helps Address

• Front-end looseness or imprecise steering feel
• Uneven suspension geometry at the front left upper position
• Wear in the control arm or ball joint assembly
• Noise from a fatigued upper suspension joint
• Fitment issues when replacing an OE-style Mercedes-Benz suspension arm

Installation Notes and Tips

Verify the vehicle’s year, model, and front left upper suspension position before installation. Compare the removed part to TC8859 and confirm mounting points, arm shape, and ball joint orientation match the original configuration. After installation, perform a wheel alignment to restore suspension geometry and steering response.

Quality Assurance

Delphi validates this part through extreme-temperature testing and extended salt spray exposure, along with dimensional and material analysis to improve OE-to-aftermarket compatibility. This part cross-references Dorman OE Solutions 520-657 for the same application.