If your key fob is dead, there are several ways to start your car. Here are some of the ways you can try:

1. Use the mechanical key inside the fob to access the key slot and then use the key fob to push the START button.
2. Insert the key fob into a port in the car and press the Start/Stop button while pressing the brake pedal down.
3. If your car doesn't have a mechanical key slot, you can hold the key fob up to the start and stop button to start the vehicle.
4. Alternatively, you can start your car with the key by inserting it into the ignition and turning it to the "On" position, then turning it to the "Start" position and holding it there for two seconds.