.. I think I need a new wheel for my 355 The front left (driver's side) seems to have less than 20psi .. this morning it was zero! Tried inflating, left it for an hour - I thought it was because of the weather (cold). But when it was zero - 10psi .. I knew something was up. I'll see what I can do to it, have it checked, probably fix. But I thought I'd go the safe way. Checked the tires, they seem okay by the way. The ring however does seem to have a 'bend' on it. With the cool weather, I wouldn't be too surprised if that's what causing the deflation. Prices and shipping costs, as well as past experiences are appreciated.
I can only add that I have heard the magnesium is prone to cracks that can leak air, but you probably already figured that out. Can't imagine a new wheel is going to be cheap...
Definitley tank your wheel before deciding on your solution. A tire shop shouldn't charge you for this and it will show any and all leaks you may have. Good luck!