What does the symbol of a car with a key inside mean in an 2003 Audi a6?

In a 2003 Audi A6, the symbol of a car with a key inside typically indicates that the vehicle's ignition is on, but the key is not detected in the ignition or that there is an issue with the key or immobilizer system. This warning can suggest that the car may not start due to a problem with the key, such as a dead battery or a malfunctioning transponder. It's advisable to check the key's battery and ensure it's properly inserted, or consult the owner's manual for further troubleshooting steps.