France striker Benzema opened the scoring against Levante in the sixth minute. Ronaldo set up Mesut Ozil for the home side's second and Benzema made the most of another defensive error to make it 3-0 in the 31st. He played in Ronaldo for Real's fourth.
The Frenchman completed his hat-trick in the 69th minute and Ronaldo added two more in the 72nd and 74th minutes as Levante, who held Real to a 0-0 draw in La Liga in September, were overwhelmed by the side from Madrid.
In other first legs on Wednesday, holders Sevilla twice came from a goal down in a 5-3 win at home to Malaga and Real Mallorca lost 4-3 at Almeria.
Published 23 December 2010, 17:17 IST