Is the driver's side window on your Smart Fortwo or Smart City Coupe (model 450) not going up and down smoothly, or is it stuck? The problem is likely the window regulator mechanism. This is a brand new replacement POWER WINDOW REGULATOR for the FRONT LEFT (driver's side) door. Important: This is the REGULATOR MECHANISM ONLY – it does NOT include the window motor. You'll reuse your existing motor from the old regulator (assuming the motor still works). It's made by LST, part number FH-857-SMFOVL--11, and is silver in color. It's constructed from metal and plastic. This part has a huge list of interchange/OEM reference numbers, including C0002691V001, 0002691V001, and many more – check your old part. The EAN is 4099565026415. Replacing the regulator is a common repair on these cars. If you're handy and can take apart the door panel, you can save a lot on labor. This part will get your Smart's window moving smoothly and quietly again. Always verify your exact Smart model and year before ordering!