Today, while preparing a new layout for business cards, the print shop (I am using Print24.de since a few years) hinted that the data should be prepared using the ICC profile "ISO coated V2.0 ECI". However, they do not offer the ICE profile for download to adjust the color space within Photoshop/Illustrator.
Well, after using Google, I have found the homepage of the European Color Initiative (ECI). In their download section, they offer the download of the profiles for free. On your Window machine, simply unpack the ZIP file, right-click on the ICC files in the Windows Explorer and choose install. Next time you restart Photoshop/Illustrator, you can choose the new, desired printing profiles.
In Europe, if you do not have any other information, use this profile (ISO coated V2.0, also known as Fogra 39L) for your print data. It is the current, common standard used by the print shops.