What is the best way to maintain the power steering system on an Audi A4?

I recently purchased a used Audi A4 and want to make sure I properly maintain the power steering system. What steps should I take to ensure it stays in good condition for a long time?

Regularly check the power steering fluid levels and top up as needed. This will help prevent damage to the system and ensure smooth steering operation.

Avoid overfilling the power steering fluid reservoir, as this can cause leaks and other issues. Stick to the recommended levels as stated in the owner's manual.

Flush and replace the power steering fluid every 50,000 miles or as recommended by the manufacturer. This will help to keep the system clean and remove any debris or contaminants.