I found that I would get Service Unavailable when I tried to go directly to the TYD page, but if I got there via the original link in the email from Porsche, or from the clickable link button on the My Porsche page, then it would work just fine.I seem to always have Service Unavailable - it's never worked for me. My SA said they raised a ticket and Porsche is looking into it. Meh.