Vinotraveller

In theory a Diamond Card entitles you to a double upgrade, subject to availability. At Innsbruck there are three SUV classes above what you have booked, so there is a good chance you might get an upgrade. Do remember to ask for your Diamond upgrade at the desk, although normally in my experience you will have been automatically upgraded by the system anyway - but there is a possibility they will allow you to choose a different upgrade. Always worth asking. I would recommend downloading the app if you have not done so already. Often the app will show you what you have been assigned a couple of hours before you arrive - quite useful. I did once have a situation where I knew I had been assigned an upgrade, but initially the agent tried to "sell" me an upgrade to the class of vehicle I was already assigned - so I just showed him the app!!! That was a one-off though, I normally find Sixt fantastic for upgrades.