To clean the interior of a Mercedes C 55 AMG, start by removing any loose items and debris from the vehicle. Use a vacuum cleaner with appropriate attachments to thoroughly clean the carpets, seats, and other fabric surfaces. For hard surfaces, use a mild cleaning solution or interior cleaner specifically designed for automotive use. Wipe down the dashboard, door panels, and other surfaces with a microfiber cloth or a soft sponge, making sure to avoid excessive moisture. Finish by cleaning the windows and mirrors using a glass cleaner and a lint-free cloth for streak-free results.