{"product_id":"dorman-538-777-suspension-ball-joint-front-lower-rear-inner","title":"Dorman 538-777 Suspension Ball Joint - Front Lower Rear Inner","description":"\u003ch2\u003eDorman 538-777 Front Lower Rear Inner Ball Joint\u003c\/h2\u003e\u003cp\u003eDorman 538-777 is a threaded suspension ball joint engineered as a standard replacement for the original equipment on select Mercedes-Benz models. It is built from steel with a rubber dust boot and mounting hardware included, making it a direct-fit service part for front lower rear inner suspension repair.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSteel construction for suspension service durability\u003c\/li\u003e\n\u003cli\u003eThreaded ball joint and threaded stud design\u003c\/li\u003e\n\u003cli\u003ePress-in mounting type for OE-style replacement service\u003c\/li\u003e\n\u003cli\u003eRubber dust boot included to help protect the joint\u003c\/li\u003e\n\u003cli\u003eStandard replacement grade for select Mercedes-Benz front suspension applications\u003c\/li\u003e\n\u003cli\u003eMounting hardware included; castle nut, grease fitting, cotter pin, and bushings are not included\u003c\/li\u003e\n\u003cli\u003eWrench size: 12 mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThis Dorman suspension ball joint, part number 538-777, is made for front lower rear inner positions on a wide range of Mercedes-Benz vehicles, including the SL500, SL550, E320, E350, CLS550, S500, and related models. It is a horizontal ball joint application used in the front suspension assembly, with fitment covering model years from 1999 through 2020 depending on the vehicle. This part cross-references Delphi TC2254 for the same application.\u003c\/p\u003e\u003cp\u003eBuilt as a standard replacement, Dorman 538-777 uses a steel body, grey finish, and rubber dust boot to support dependable suspension service. The threaded design and press-in mounting style align with OE-style repair needs for Mercedes-Benz front lower rear inner ball joint replacement.\u003c\/p\u003e\u003ch2\u003eCommon Repair Symptoms\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFront suspension clunking or knocking over bumps\u003c\/li\u003e\n\u003cli\u003eExcessive play in the lower control arm area\u003c\/li\u003e\n\u003cli\u003eUneven tire wear caused by worn suspension joints\u003c\/li\u003e\n\u003cli\u003eLoose or imprecise steering feel\u003c\/li\u003e\n\u003cli\u003eVisible dust boot damage or joint wear at the front lower rear inner position\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eVerify the vehicle’s front lower rear inner ball joint position before ordering.\u003c\/li\u003e\n\u003cli\u003eConfirm threaded and press-in specifications match the original suspension layout.\u003c\/li\u003e\n\u003cli\u003eInspect the surrounding control arm and mounting surfaces for wear before installation.\u003c\/li\u003e\n\u003cli\u003eUse the correct 12 mm wrench size during service.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended for Mercedes-Benz suspension repair.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDorman engineers and tests this replacement ball joint to meet the needs of specific vehicle applications. It is intended as a reliable OE-style service part for Mercedes-Benz suspension repair, with fitment coverage for models such as the SL500, SL550, E-Class, CLS-Class, and S-Class listed above.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":52763260551349,"sku":"BKKY-538-777","price":24.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_538777_Fro.jpg?v=1783144962","url":"https:\/\/www.partcatalog.com\/products\/dorman-538-777-suspension-ball-joint-front-lower-rear-inner","provider":"PartCatalog","version":"1.0","type":"link"}