Dorman 538-778 Suspension Ball Joint - Front Lower

Dorman 538-778 Front Lower Ball Joint

Dorman 538-778 is a threaded suspension ball joint built as a standard replacement for the original equipment on select Mercedes-Benz applications. It is precision-engineered and tested for reliable fit and function on front lower suspension positions, including Mercedes-Benz E300, E350, E550, E280, E500, E320, C220, and C230 models.

Key Features

• Threaded, bolt-in suspension ball joint for front lower use
• Steel construction with a grey finish
• Rubber dust boot included
• Standard suspension grade replacement
• Tapered stud design with 12 mm wrench size
• No grease fitting, cotter pin, bushings, washers, or mounting hardware included
• Cross-references MOOG Chassis Products K9918 and Delphi TC835 for the same application

Detailed Description

This Dorman suspension ball joint, part number 538-778, is designed for direct replacement on specific Mercedes-Benz front lower suspension locations. The steel body and rubber dust boot support dependable service in the steering and suspension assembly, while the threaded, bolt-in design helps match OE-style mounting on the listed vehicles. It is a standard replacement part for drivers servicing worn front suspension joints on Mercedes-Benz E300, E350, E550, E280, E500, E320, C220, and C230 models.

Compatible fitment includes 2008-2009 Mercedes-Benz E300, front lower; 2006-2009 Mercedes-Benz E350, front lower; 2007-2009 Mercedes-Benz E550, front lower; 2007 Mercedes-Benz E280, front lower; 2004-2006 Mercedes-Benz E500, front lower; 2004-2005 Mercedes-Benz E320, front lower; 1997 Mercedes-Benz C220, front lower; and 1996 Mercedes-Benz C230, front lower. If you are searching for a Mercedes-Benz front lower ball joint replacement, Dorman 538-778 provides a direct-fit option for these applications.

Common Repair Applications

• Front-end clunking or looseness from a worn ball joint
• Uneven tire wear related to suspension joint play
• Steering wander or reduced front suspension stability
• Restoring proper articulation in the front lower control arm area
• Replacing a damaged or corroded OE-style ball joint

Installation Notes and Tips

Verify the vehicle’s front lower suspension configuration before ordering, since fitment is specific to the listed Mercedes-Benz models and years. Inspect the mating control arm, fasteners, and surrounding suspension components for wear before installation. Because this part does not include a grease fitting, it is a sealed-style replacement and does not require routine greasing.

Quality Assurance

Dorman states that this ball joint is precision-engineered and rigorously tested to provide a reliable replacement for the original equipment on specific vehicles. Part number 538-778 is built to standard suspension replacement specifications for the listed Mercedes-Benz applications.