I've noticed that supermarkets often put alcohol free beverages and low alcohol beverages next to each other. I have asked our local Sainsbury's to reconsider how they display their alcohol free beverages, ensuring that they are clearly labelled, preferably kept away from the low alcohol content beverages. A lot of the staff are not aware of how detrimental it can be for someone to pick up a low alcohol content beverage thinking it's in fact alcohol free (especially if it states it is 'non-alcoholic').
There's alcohol in things we aren't aware contains alcohol. As far as the DVLA are concerned (yes, I've asked them, about 3 - 4 years ago, when I first applied for my licence back), non alcoholic/alcohol free beverages are fine when it comes down to anyone with misuse/dependency on record. Low alcohol beverages are not fine.
Here is a perfect example of where buying a 'non alcoholic' beer could leave you in a sticky situation during a DVLA medical: Beavertown Lazer Crust - Non-Alcoholic IPA is available at our local Sainsbury's and claims to be non-alcoholic, when in fact it is 0.3% ABV. As far as the DVLA are concerned, it is a low-alcoholic beverage and would cause someone that had been previously alcohol dependant to have their driving licence application rejected.
I can confirm that Perlenbacher 0.0 is indeed 100% alcohol free, and you aren't breaking any rules by drinking it (if you've ever been alcohol dependant). If the beverage you're drinking contains less than 0.05% ABV, it's classed as alcohol free.
My advice, regarding whether you should tell your doctor/GP, the DVLA or the DVLA approved doctor (at your medical examination) that you drink non-alcoholic beverages, is to not do so. I only say that because they could easily assume that you are drinking low alcoholic beverages. It's just a possible headache that I'd suggest you avoid.
