Mercury - Active Trim DTS Kit (Without Trim Pad) VesselView Controlled 8M0129437. Overview. The Mercury Active Trim DTS Kit (8M0129437) gives you full automatic trim control through your VesselView display instead of a separate trim pad. Designed for Digital Throttle & Shift (DTS) and Joystick Piloting System (JPS) outboards or sterndrives, this system automatically adjusts engine trim for better performance and fuel efficiency.. Control and setup are handled directly on your VesselView 403, 502