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Gas cap cover engine lite E350

Old Feb 13, 2026 | 09:05 AM
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2015 E350
Question Gas cap cover engine lite E350

I replaced the gas cap cover with an aftermarket one from Amazon. Since then, the engine light has stayed on. My shop said it was because a genuine MB cover is not being used. Is this true, and is there a work-around? 2015 E350.
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Old Feb 13, 2026 | 09:43 AM
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Gas cap errors are usually triggered when the cap was left off or not seated, so your replacement cap is likely not sealing properly. Was the original cap causing errors, and why did you not replace it with a MB OE part?
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Old Feb 13, 2026 | 11:48 AM
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Thanks. Original only had broken connection piece. In hindsight I did not need to replace. My shop said it could happen. Any ideas or workarounds?
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Old Feb 13, 2026 | 11:57 AM
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If your Amazon replacement came with the lanyard, any chance of transferring just it to your original cap?
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Old Feb 13, 2026 | 05:13 PM
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I didn't keep it. Not sure why because it wasn't broken. The replacement looked and fit so well, I didn't think it would be a problem.
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