T4 wheel nuts on Caddy rims

[ericcs]

My son's T4 has audi alloy's on it currently. He has just purchased a set of Caddy steel rims for it, but has been told the shape of the T4 bolt style won't suit. On the other hand, I have spoken to a generic wheel expert, and he tells me all VW bolts are the same shape, just vary in diameter and shank length. Can anyone settle the debate please!