The Check Engine Light is On, What Should I Do?

liusijia_193769
Thu, 29 May 2025 22:00:26 +0000
Maintenance/Repairs

Hi everyone,

I drive a 2022 Mercedes-Benz CLS-Class, and today the check engine light came on while driving under normal conditions in the city. The car still drives smoothly — no rough idling, no loss of power, no unusual sounds — but the light remains on even after restarting the engine.

I haven’t noticed any performance issues, but I’m a bit concerned.
Has anyone experienced this on the CLS before?

I haven’t used an OBD2 scanner yet — do you think it’s worth getting one to check the code myself before going to the dealer? Or would you recommend going straight to a Mercedes service center?

Could it be something simple like a loose gas cap or a minor sensor fault? Or is it likely related to something more serious like the emissions system?

The Mercedes me app just says: “Engine control system malfunction – visit workshop,” but it doesn’t provide any specific details.

Any advice or shared experience would be greatly appreciated!

Thanks in advance!

6 posts - 6 participants