# 2001 Mercedes-Benz C-Class - CEL on for 12 years

**URL:** <https://community.cartalk.com/t/2001-mercedes-benz-c-class-cel-on-for-12-years/141253>\
**Category:** Maintenance/Repairs\
**Tags:** mercedes-benz\
**Created:** [May 29, 2019, 11:04pm UTC](https://community.cartalk.com/t/2001-mercedes-benz-c-class-cel-on-for-12-years/141253 "2019-05-29T23:04:57Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Marvinmillman](https://avatars.discourse-cdn.com/v4/letter/m/df788c/32.png) [@Marvinmillman](https://community.cartalk.com/u/Marvinmillman)\
**Post date:** [May 29, 2019, 11:04pm UTC](https://community.cartalk.com/t/2001-mercedes-benz-c-class-cel-on-for-12-years/141253/1 "2019-05-29T23:04:57Z")

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I have a c240 Mercedes 2001. My check engine light has been on for the last 12 years permanently . The car drives fine . What should I make of it . Several mechanics have looked at it and find nothing

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**Author:** ![tcmichnorth](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tcmichnorth/32/25126_2.png) [@tcmichnorth](https://community.cartalk.com/u/tcmichnorth)\
**Post date:** [May 29, 2019, 11:42pm UTC](https://community.cartalk.com/t/2001-mercedes-benz-c-class-cel-on-for-12-years/141253/2 "2019-05-29T23:42:26Z")

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If the3check engine light is on, there is a code that can be retrieved from the computer. Either the mechanics failed to tell you what the codes are or you have a faulty check engine light. A faulty light is pretty much inconceivable.