The CEL just went on on my wife's 2017 c-300, soon after she got gas. Always use premium gas. Only 25,000 miles. Driven all the time but few miles. It is way over the maintenance schedule by about 6 months but within the mileage required. Dealer maintaines but now that warranty has expired we take it to a local MBZ mechanic. I removed the gas cap and put it on again, thinking that may be the problem. Car runs fine otherwise. How do I clear the CEL message? What's a reliable scanner tool to get? We are not mechanically inclined AT ALL.

Thank you,

Mirko

 

Here is a discussion with a link to a scanner that might help : https://mbworld.org/forums/c-class-w...-no-codes.html

 

The Launch Elite 2.0 MB is a great scanner for the money. Everyone should have one.