Motorad MO306 Engine Oil Filter Cap

Engine Oil Filter Cap Overview

The Motorad MO306 engine oil filter cap is a specific-fit replacement for select Mercedes-Benz and INFINITI applications. It is built from OEM-approved plastic with a rubber seal to support reliable service in demanding temperature and operating conditions.

Use the MO306 when you need a standard replacement oil filter cap with screw-on attachment, round shape, and indicator markings for straightforward service work. The black finish and specific-fit design make it a practical match for many Mercedes-Benz CLA250, GLA250, and C300 applications, as well as select INFINITI Q50 and Q60 models.

Key Features

• Specific-fit engine oil filter cap for select applications
• OEM-approved plastic construction for durability
• Rubber gasket or seal included for sealing performance
• Screw-on attachment for secure installation
• Round black design with indicator markings
• Standard replacement grade for routine service

Detailed Description

Motorad MO306 is engineered as a direct-style oil filter cap replacement for vehicles that use a threaded, screw-on cap design. The cap measures 78.99 mm thread diameter and features a round profile with a 35.56 mm cap depth, helping it match the original service part configuration. Its plastic construction and OEM-quality material selection are intended for consistent performance in harsh underhood conditions. This part cross-references Dorman - OE Solutions 921-177 for the same application.

Compatible With Mercedes-Benz and INFINITI models including CLA250, GLA250, GLB250, C300, E350, GLC300, GLE350, Metris, Sprinter 1500, Sprinter 2500, A220, A35 AMG, and Q50, Q60, and QX30 applications. The MO306 part number is also useful when searching for a replacement oil filter cap for Mercedes-Benz C300 and Mercedes-Benz GLC300 service needs.

What It Is Used For

• Replacing a cracked or worn oil filter cap
• Restoring proper sealing at the oil filter housing
• Addressing stripped or damaged threads on the cap
• Correcting service issues caused by a missing indicator-marked cap

Installation Notes and Tips

Verify thread diameter, cap depth, and seal condition before installation. Confirm the vehicle application against the fitment list for the exact year and model, since this is a specific-fit part. The screw-on design allows service replacement without modifying the housing when the original configuration matches.

Quality Assurance

Motorad manufactures this cap to meet or exceed OEM quality standards in ISO TS16949 facilities. The MO306 uses OEM-approved materials selected for durability in extreme temperatures and operating conditions.