Mercedes-Benz Gas Caps — Which One Do You Need?
Two part numbers cover almost every Mercedes on the road. Direct-fit aftermarket replacements that restore proper fuel system sealing and commonly clear EVAP check engine lights, “loose gas cap” warnings and fuel vapour odour. Pick your path below — it takes about ten seconds.
2012 or older
You need 2214700605
C-Class, CL, CLK, CLS, E-Class, G-Class, GLK, S-Class, SL, SLK and SLC from 2000 up. No ambiguity in this range — there is only one cap.
View 2214700605 →
2013 – 2018
Read your old cap first
Both part numbers were in service across these years, and model year alone will not settle it. Open the fuel door, unscrew the cap, and read the number moulded into the plastic. Then buy the one that matches.
Cap missing or the number worn away? Send your VIN and we will confirm which one your car left the factory with.
2019 or newer
You need 2224700205
C-Class, E-Class, S-Class, CLS, GLC, SL, CLA, GLA, AMG GT and Maybach through 2023. No ambiguity in this range either.
View 2224700205 →
Why the overlap exists. Mercedes changed cap design part-way through the 2010s, and the changeover did not happen across the whole range at once. A 2015 E-Class and a 2015 GLC can take different caps. That is why the number moulded into your existing cap beats any year chart, including ours — it is the only source that describes your specific car. Each product page carries its own full model-and-year table.
Signs your gas cap has failed
- Check engine light with EVAP codes P0455, P0456 or P0457
- “Loose gas cap” or fuel system message on the dash
- Fuel vapour smell near the filler neck
- Cap no longer clicks, or will not stay tight
- Visible cracking, or a hardened or split rubber sealing ring on the underside
Installation
Remove the old cap, inspect the filler neck for debris or damage, fit the new cap and tighten until it clicks. Many EVAP-related check engine lights clear on their own after several drive cycles; a scanner clears it immediately.
Common questions
Will a new gas cap fix my check engine light?
If the code is an EVAP leak caused by a bad seal, yes. Most owners see the light clear within a few drive cycles.
What if the light stays on?
It points to a deeper EVAP fault — purge valve, vent valve or a cracked hose. The cap is still worth ruling out first; it is by far the cheapest cause.
Is it safe to drive with a bad gas cap?
Generally yes, but it lets fuel vapour escape and will fail an emissions test. It is a quick, inexpensive fix.
Can I just buy the newer cap for an older car?
No. The two caps differ in thread and sealing design, not just appearance. Fitting the wrong one either will not seat or will not seal, and you will be back to the same EVAP code.
