 After winning the Bundesliga 2 division West, RCL faced Rugby Club Rottweil, runners-up from Bundesliga 2 division South, in the semifinals of the promotion play-offs.RCL won the game 35-19 in front of a large crowd at Cessange, reaching the promotion final against StuSta Munich.RCL beat Munich 18-12, after leading 18-0 at half time, gaining promotion to Bundesliga 1 and now hopes to establish itself in the German topflight for the 2018-2019 season.