I have owned my 2014 SQ5 from new, and have just over 95000km on it.
I don’t have a sunroof, so never had that issue, and the only squeak/rattle I have noticed is the tailgate struts. Put some lubricant on it regularly, and no longer an issue.
As far as the DPF, I haven’t had issues, but one of the members on here mentioned it about 2 1/2 years ago. He mentioned a product- Liqui Moly Diesel Particulate Filter Anti Clog, that you add to the fuel tank.
I have done this a handful of times over the last 45000km, and I have noticed that the DPF might self clean a little more often (?). So, I don’t know whether this maintenance has prevented an issue, or if my driving habits meant it wouldn’t happen anyway, but so far so good.
From what I can tell from ownership, if you get a well maintained example, then it will likely turn out to be a great car.
All the best with your search.
Sent from my iPad using Tapatalk
Current rides: Audi SQ5, HSV E3 GTS, Ducati Streetfighter