Bayern controlled proceedings from the start up north and went ahead early on when Giulia Gwinn got down the right and crossed into the box. Goalkeeper Lea Paulick wasn't able to gather the ball, allowing Imade to head in.
Hearts had enough chances to have won more convincingly, but their supporters greeted the full-time whistle with jubilation as they stretched their lead over Rangers and Celtic, who face each other at Ibrox on Sunday.
Brentford manager Keith Andrew looked to celebrate his new long-term deal with a comfortable win amid a mutinous atmosphere when first-half goals from Damsgaard, Igor Thiago and Kevin Schade put the visitors three up.
Ronaldo's quest to reach 1,000 goals won't be achieved this season, even if he continues to receive gift-wrapped spot-kicks as he did tonight. Home defender Abdullah Al-Hawsawi was adjudged to have fouled the Portuguese while back-pedalling to try to clear a right-wing cross. It was a farcical decision reached by referee Majed Al-Shamrani and the VAR but Ronaldo showed no mercy, firing the spot-kick into the bottom left-hand corner.