Tiergarten Tom, if you're looking for suggestions on where to find things (converters,
grocery stores etc.) in the Berlin area, try posting to the
Life in Berlin forum. You're currently posting in a
Germany-wide part of TT, so you're going to get responses from people all over the country - which might not be helpful unless you're happy to travel to Bavaria to buy your stuff. I'm sure the mods will move this anyway, but just so you know.
ps - welcome to Germany and to Toytown!
Edit: of course, once again the Muenchener TTers prove they're ace at hunting down info, no matter the location.