Karim Benzema, Gareth Bale and Ronaldo all scored twice in the 6-1 first-leg win in Germany.
Ronaldo said: "It's not only the 'BBC' (Bale, Benzema and Cristiano) scoring the goals - it's the whole team contributing: Iker too, the defence... congratulations to the team."
"I'm very happy," Real coach Carlo Ancelotti said. "We have worked hard for this."
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