Gates 31849 Fuel Tank Cap

OE Fuel Cap for Mercedes-Benz Applications

The Gates 31849 OE Equivalent Fuel Cap is built for Mercedes-Benz fuel systems that call for a vented, OE-style replacement cap. It is made with rugged, heavy-duty construction and meets or exceeds OEM specifications for fit and function.

This fuel tank cap is designed for shallow cam filler necks and supports vented, non-vented, and vented anti-surge configurations. It is a direct-fit option for many Mercedes-Benz models, including E-Class, C-Class, SLK, CLS, G-Class, and select Chrysler Crossfire and Dodge Sprinter applications.

Key Features

• Gates OE Equivalent Fuel Cap, part number 31849
• Vented design for the listed applications
• OE Performance comparison rating
• Heavy-duty construction for everyday service
• Fits shallow cam filler necks
• Meets or exceeds OEM specifications
• Thread diameter: 1.52 in; shell diameter: 2.93 in; depth: 0.73 in
• Not lockable

Product Details

The Gates OE Equivalent Fuel Cap line is built for drivers who need an OE-style replacement without changing the original fuel system setup. Part number 31849 is vented and sized for the listed filler neck dimensions, helping maintain proper tank sealing and vapor control on many Mercedes-Benz vehicles. This part cross-references Genuine 2304700405 for the same application.

Compatible fitment includes many Mercedes-Benz models such as the 2007-2016 E550, 2008-2015 C63 AMG, 2003-2009 E320, and 2009-2018 G550, along with select Chrysler Crossfire and Dodge Sprinter 2500/3500 applications. For shoppers searching for a Mercedes-Benz fuel cap replacement, Mercedes-Benz E-Class fuel tank cap, or Mercedes-Benz C-Class vented gas cap, Gates 31849 is an OE-equivalent option.

Common Problems This Part Can Address

• Loose, worn, or damaged fuel cap sealing surfaces
• Fuel vapor leaks that trigger evaporative emissions faults
• Check engine lights related to fuel cap sealing issues
• Difficulty maintaining a proper seal on the filler neck
• Replacement needs after a missing or cracked cap

Installation Notes and Tips

Verify filler neck style, venting type, and vehicle emissions configuration before ordering. This cap is for shallow cam filler necks and is listed for vented applications; some vehicles in the fitment data note W/O PZEV emissions. Confirm the existing cap style and compare the dimensions to your original part before installation. After installation, tighten the cap until it seats properly.

Quality Assurance

Gates OE Equivalent Fuel Caps are engineered to meet or exceed OEM specifications and are built with rugged, heavy-duty materials for OE-style service life.