{"product_id":"dorman-538-770-suspension-ball-joint-front-upper","title":"Dorman 538-770 Suspension Ball Joint - Front Upper","description":"\u003ch2\u003eDorman 538-770 Front Upper Ball Joint\u003c\/h2\u003e\u003cp\u003eDorman 538-770 is a front upper suspension ball joint for select Mercedes-Benz models, including E-Class, CLS-Class, and SL-Class applications. It is precision-engineered and tested as a direct replacement for the original equipment part, with a bolt-in, threaded design for the specified vehicles.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFront upper suspension ball joint for select Mercedes-Benz applications\u003c\/li\u003e\n\u003cli\u003eDirect replacement for OE-style fit and function\u003c\/li\u003e\n\u003cli\u003eThreaded, bolt-in mounting type with 3 mounting holes\u003c\/li\u003e\n\u003cli\u003eAluminum construction with grey finish\u003c\/li\u003e\n\u003cli\u003eDust boot included; grease fitting, castle nut, cotter pin, and bushings not included\u003c\/li\u003e\n\u003cli\u003ePremium suspension grade type\u003c\/li\u003e\n\u003cli\u003eTapered stud design with 12 mm wrench size\u003c\/li\u003e\n\u003cli\u003eCross-references Beck\/Arnley 101-6897 and MOOG K500222 for the same application\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThis Dorman suspension ball joint, part number 538-770, is built for front upper suspension service on Mercedes-Benz SL500, SL550, SL600, SL63 AMG, SL65 AMG, SL55 AMG, CLS350, CLS500, CLS550, CLS63 AMG, CLS55 AMG, E280, E320, E350, E500, E550, E63 AMG, and E55 AMG applications. It uses an aluminum body, a threaded bolt-in mounting style, and a tapered stud to match the specified OE configuration. The included dust boot helps protect the joint from road contamination, while the premium suspension grade construction supports consistent steering and suspension operation.\u003c\/p\u003e\u003cp\u003eFor buyers searching for a Mercedes-Benz front upper ball joint replacement, Dorman 538-770 is a fitment-specific option for the listed E-Class, CLS-Class, and SL-Class vehicles. It is also referenced by other aftermarket part numbers, including Beck\/Arnley 101-6897 and MOOG K500222, for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFront-end looseness or play from a worn upper ball joint\u003c\/li\u003e\n\u003cli\u003eClunking or knocking noises from the front suspension\u003c\/li\u003e\n\u003cli\u003eUneven steering response caused by joint wear\u003c\/li\u003e\n\u003cli\u003eSuspension movement issues at the upper control arm connection\u003c\/li\u003e\n\u003cli\u003eInspection failures related to ball joint condition\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify vehicle year, model, and front upper position before installation. This part uses a bolt-in mounting type with three mounting holes and a threaded stud design, so confirm the original suspension layout matches the listed application. Inspect the surrounding control arm, fasteners, and mounting surfaces for wear or damage before assembly. Because this part does not include a grease fitting, it is a sealed-style service component for the specified fitment.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDorman states that this suspension ball joint is precision-engineered and rigorously tested to provide reliable replacement performance for the original equipment on specific vehicles. Part number 538-770 is built to meet the requirements of the listed Mercedes-Benz applications.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":52763260092597,"sku":"BKKY-538-770","price":46.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_538770_Bac.jpg?v=1783144912","url":"https:\/\/www.partcatalog.com\/products\/dorman-538-770-suspension-ball-joint-front-upper","provider":"PartCatalog","version":"1.0","type":"link"}