Porsche Macan S wheel on Audi A4 B7?

I did see some 2nd hand Macan S wheel sale on web, here’s wheel parameter I knew :

• 5×112
• Front: 18×8 (8") ET21
• Rear: 18×9 (9") ET21
• 9Kg each one

Can it be installed on my A4 B7 Avant ? If yes, will it too width for my car since it’s ET21 ?