My SLK32 has the HID headlights and I noticed that each headlight unit has an unused socket for a lamp. I believe this lamp is commonly used in the EU as a "city light", and is turned on when the main lamps are turned off to be less annoying in city driving. I'd like to make use of this feature as a daytime running light. These unused sockets are wired but when I plug in a lamp, it doesn't turn on. I don't find a fuse for this either. The socket accepts a miniature wedge base lamp.
Anyone know what's required to make these lambs work?
Thanks