What year is it?
I’m assuming it’s a similar unit to the Mondeo; the earlier mkIV models didn’t have A2DP (bluetooth streaming), it was a feature quietly added in later models. Possibly somehere around 09? They added USB at the same time, so I’d hazard that if you have a USB port you’ll have AD2P, if you’ve just got a 3.5mm audio jack then you won’t.
The other thing is, the stock firmware is rubbish. I had all manner of ephemeral problems with mine until I got the latest firmware – I requested it during a service – and they all went away. Weird things like you the display suddenly forgetting it had half of the features, or half the controls stopping working, or sometimes it just refused to pair for no good reason.
This is for the Sony unit in the Titanium anyway; the other units might be different?