Genuine OEM Audi Engine Start Stop Switch Button, part number 8V0905217C. This crucial component allows the driver to activate or deactivate the vehicle's engine start-stop feature, contributing to fuel efficiency and reduced emissions. It is a compact electrical switch with a prominent red button clearly marked 'START ENGINE STOP'. Weighing 0.023 kg with dimensions of 0.058m x 0.035m x 0.025m, it ensures precise fitment and reliable electrical connection. Choosing a genuine OEM switch guarantees correct electrical signaling and durability, preventing intermittent operation and ensuring consistent vehicle functionality.