Aftermarket Mercedes Gas Caps

Two OEM-style aftermarket fuel caps by part number — designed to restore proper sealing and help resolve common EVAP-related issues.

Mercedes Gas Cap 2224700205 with caution text

Gas Cap — 2224700205

Common replacement for many newer Mercedes models. Direct-fit OEM-style seal.

View Gas Cap 2224700205
Mercedes Gas Cap 2214700605 with remove slowly warning

Gas Cap — 2214700605

Widely used across earlier Mercedes platforms. Restores proper fuel system sealing.

View Gas Cap 2214700605

Not sure which part number fits your vehicle? Send us your model, year, or VIN.

Why a gas cap matters: A worn or missing fuel cap can allow vapor leaks and may contribute to EVAP-related check engine lights, fuel odor, or “loose cap” warnings (vehicle-dependent). Replacing the cap is often one of the simplest first steps before deeper diagnostics.

Common Symptoms of a Bad Mercedes Gas Cap

  • Check Engine Light with EVAP-related faults (varies by model)
  • “Loose gas cap” or fuel system warning message (vehicle-dependent)
  • Fuel smell / vapor odor around the filler area
  • Cap won’t click or won’t tighten correctly
  • Cracked seal, brittle rubber, or damaged locking tabs

Why EVAP Leaks Happen

Mercedes EVAP systems are designed to contain and route fuel vapors properly. When the fuel cap seal wears out, the system may not hold pressure/vacuum as expected. That can trigger EVAP faults on some models — even though the car still drives normally.

Real-world note: A gas cap won’t fix every EVAP issue — but it’s one of the most common, cheapest, and fastest items to eliminate before chasing purge valves, vent valves, or hoses.

How to Choose the Correct Gas Cap

The most reliable method is selecting by part number. If you’re unsure, check your existing cap for a stamped/printed number or send your VIN and we’ll confirm fitment.

  • 2224700205 — common fitment on many newer Mercedes applications
  • 2214700605 — widely used across many earlier Mercedes platforms

If you’re between options, we recommend confirming by VIN to avoid returns.

Installation Tips

  • Remove the old cap and inspect the rubber seal for cracks or flattening
  • Install the new cap and tighten until it clicks (if applicable)
  • If a check engine light was caused by a loose cap, it may take a few drive cycles to clear (or can be cleared with a scan tool)

FAQ

Will a new gas cap clear my check engine light?

Sometimes. If the light was triggered by an EVAP leak caused by a loose/damaged cap, replacing it can help. The light may take a few drive cycles to turn off, or it can be cleared with a scan tool.

What if my gas cap clicks but I still have an EVAP code?

EVAP faults can also come from purge/vent valves, hoses, or seals. A gas cap is still a smart first step, but further diagnosis may be needed if codes return.

Is it safe to drive with a bad gas cap?

Usually the car will drive fine, but a bad cap can allow fuel vapor leaks and may trigger warning lights. Replacing it is inexpensive prevention and helps keep the EVAP system sealing properly.

How do I confirm which cap I need?

Check your existing cap for a part number, or send your model/year/VIN and we’ll confirm fitment before ordering.

📩 Send Your VIN for Fitment Confirmation

Fast reply — helps avoid returns and ensures the correct part number.

Aftermarket Mercedes Gas Caps