How can I turn on the lights on M-class? Updated October 03, 2022 16:24 Press and hold + button for 3 seconds. Related articles What kind of maintenace should I do on my M-class? How can I turn on the lights on X-class? What's the max speed of Ariel Rider M-Class Commuter Ebike? The Speedometer isn't working What is the weight limit on M-Class? Comments 0 comments Please sign in to leave a comment.