Both during the subsequent run in the 1980s and at numerous other times over the century the stadium has been in operation, there have been many memorable nights for the local fans. However, Pittodrie's greatest night is generally regarded as 16 March 1983. Aberdeen fought back from 2–1 down in a European Cup Winners' Cup quarter-final second leg tie against Bayern Munich to win 3–2. A full house witnessed this victory, which took the Dons through to the semi-finals, and they went on to win the trophy by defeating Real Madrid in the final. The club installed 24 executive boxes in the Main Stand, and built a new roof over the Merkland Road End in 1985. Undersoil heating was installed in 1987.