Delphi TC2478 Suspension Control Arm - Rear Left Upper Rearward

OE-Style Rear Left Upper Rearward Control Arm

Delphi TC2478 is a suspension control arm built for the rear left upper rearward position on select Mercedes-Benz models. It uses aluminum construction with a casting/forged design and a blasted finish to support precise suspension geometry and consistent replacement fitment.

Fits 2007-2013 Mercedes-Benz CL550, rear left upper rearward. Fits 2012-2013 Mercedes-Benz S350, rear left upper rearward. Fits 2010-2013 Mercedes-Benz S400, rear left upper rearward. Fits 2007-2013 Mercedes-Benz S550, rear left upper rearward. Fits 2008-2011 Mercedes-Benz S450, rear left upper rearward. Fits 2008-2010 Mercedes-Benz CL63 AMG, rear left upper rearward. Fits 2008-2010 Mercedes-Benz S63 AMG, rear left upper rearward.

• Aluminum suspension control arm for rear left upper rearward placement
• Casting/forged construction for OE-style dimensional consistency
• Bushings included; ball joint not included
• Black bushing color with white arm finish
• Pre-greased: No
• Grease fitting included: No
• Mounting hardware included: No
• Standard replacement grade
• Part number: TC2478

Detailed Product Information

Delphi TC2478 is engineered as a standard replacement suspension control arm for Mercedes-Benz CL550, S350, S400, S450, S550, CL63 AMG, and S63 AMG applications listed above. Delphi applies OE-level dimensional and material analysis to help match the original part geometry, and the component is tested across extreme temperature ranges and salt-spray exposure to verify durability in demanding conditions. This part cross-references Beck/Arnley 102-6804 for the same application.

Common Suspension Issues Addressed

• Rear suspension looseness or wandering caused by worn control arm bushings
• Clunking or knocking from the rear suspension during load changes
• Uneven rear tire wear related to suspension geometry wear
• Excessive rear-end movement over bumps or during cornering
• Restoring rear left upper rearward suspension alignment after wear-related replacement

Installation Notes and Quality Assurance

Verify the rear left upper rearward position before installation and compare the original arm length, mounting-hole spacing, and bushing orientation to the replacement part. Because mounting hardware is not included, reuse or source the correct hardware as needed, and inspect adjacent suspension components for wear before completing the repair. Delphi TC2478 is backed by Delphi’s OE-focused manufacturing and validation process for aftermarket steering and suspension parts.