The World Rallycross Championship will hold a new event alongside the DTM at Hockenheim this year.
World RX has announced a deal with DTM organisers ITR to have a 13th round of the championship on the same weekend as the German touring car race on 1-3 May.
A purpose built rallycross circuit is being built in the famous "Sachs Arena" stadium section.
World RX the deal with the DTM is multi-year.
The weekend will also feature the Porsche Carrera Cup Deutschland, the Formula Three European Championship and the new-for-2015 Audi Sport TT Cup as support races.
"It is a great honour to partner with DTM at their 2015 season-opening weekend at the Hockenheimring," said World RX boss Martin Anayi.
"We have been extremely impressed with the professionalism we have seen from ITR in running DTM and we can't wait to show the German motorsport audience just how special World RX is.
"There is a natural link with [Mattias] Ekstrom competing in both championships and also with permanent World RX driver [Anton] Marklund competing in the new Audi Sport TT Cup. We were thrilled when the opportunity arose to build a purpose built rallycross circuit in one of the world's most famous venues.
"Coupled with the fact that an RX event would be held on such an important weekend in the German motorsport calendar was the icing on the cake. As a result, we now have a fantastic chance to showcase World RX and our sport to a brand new audience. We are very excited about developing our relationship with ITR and look forward to future collaborations."
ITR Chairman Hans-Werner Aufrecht added: "Whatever we do, we always do it allowing for the interests of the fans we want to provide a unique experience, at the circuit.
"In consideration of this fact, the FIA World Rallycross Championship suits us perfectly: the DTM high-tech touring cars and the rugged compact World RX racers represent two different, fascinating motor-sport facets. I am convinced that the motor-racing enthusiasts will love this combination."