What is the best way to check tire tread depth on an Audi A6?

I want to know how to check my tire tread depth on my Audi A6 without going to a mechanic. Is there a specific tool or method recommended for this?

According to Audi's official maintenance guide, the easiest way to check your tire tread depth is by using a quarter coin. Insert the quarter into the tread groove, with the bottom of Washington's head facing down. If the top of Washington's head is covered by the tread, your tires are still in good condition. If not, it's time to replace them.

Investing in a tread depth gauge tool can provide more accurate measurements compared to using a coin. It is especially useful for Audi A6 owners who live in areas with heavy rainfall or snow, as deep treads are important for traction in wet or snowy conditions.

If you prefer a more hands-on approach, you can perform the penny test. Insert a penny into the tread groove, with Lincoln's head facing down. If his head is still visible, your tires are too worn and need replacement. This method is not as precise as using a gauge, but it can give you a general idea.