Previously asked many times: http://typophile.com/node/72193, http://typophile.com/node/67429, http://www.typophile.com/node/80181, http://typophile.com/node/79474
Custom job by Claudia Klat and Lisa Weiss. Not commercially available, some sort of DIN Mono Condensed. Suggestions for similars: DIN Mono, Lutz Headline, Korolev, Wilma Base, JB Heureka (very close), Jean-Luc Godard, Dezen, Monofonto, PDU (by Dries Wiewauters, also very close using some alternates), Sugo, Tes, DIN Engschrift, Vwk by Think Work Observe

I need help too :)