Going to have to strongly disagree, diesels have excellent engine braking.Thats the best looking Touareg made right there.. that white, brown interior, r-line Exec.. absolutely gorgeous. Love the wheels too.
Your Touareg should already have 20s on it.. you mean you're getting different 20s?
Compression braking - diesels dont compression brake naturally. Not really gonna happen.
Edit - please don't use the Wikipedia article on engine braking, as it is extremely incorrect.