I borrowed a VW Transporter recently with DAB Radio. All good apart from the fact it will only find BBC stations. We now have a very similar problem with the TV at home. We have other DAB radios that will find loads of non BBC stuff.
mine has different "Channels" that you switch between to get different blocks of stations.
Took me ages to work it out as I normally listen to 6 music and wanted to switch to listen to a football match on Talk Sport and it was in a different channel.
My pioneer unit seems to pick up everything from the BBC channels, to local and national stations. So long as I can get BBC R3 & R4 and Union Jack I'm happy though.
Kind of surprised by this, I've got DAB in a MK7 Golf and it's great, rarely loses signal. When I got it I assume it would be rubbish, but I've been genuinely surprised, I can get all sorts of non BBC channels too.
There was some sort of frequency change for DABs last year as my Juke had to go in for a recall fix as the DAB stopped picking up any stations and they had to 'retune' it.
I was going to say it might be worth triggering a re-tune or re-scan so the DAB system can do a fresh scan and pick up any changes or new stations that may not have been available at the location it was last 'tuned'.
I had the same problems with a VW Dab, it would hardly find anything. I went into the channel listings and there they all were, added as presets and all is well.