Why does my Audi A6's engine sound different when I start it in the morning?

I've noticed that my Audi A6's engine doesn't sound as smooth and quiet when I start it in the morning compared to the rest of the day. Is this a common issue or something I should be concerned about?

The most probable reason for this is because the engine oil in your Audi A6 thickens overnight in cold temperatures, making it harder for the engine to turn over and causing the rough start. To avoid this, consider using an oil designed for colder climates or warming up your car for a few minutes before driving.