Standard Liege had their hosts on the back foot from the start and took an early lead after a ball from the Rangers right was turned in at the front post.
Connor Goldson redeemed himself with an excellent free header to level, but Liege hit back immediately before James Tavernier fired in from the penalty spot on the stroke of half-time to send the teams in level.
Rangers were much improved in the second half and Scott Arfield, whose goal against Galatasaray sent Rangers into the groups, sent them into the knock-out stages by converting Ryan Kent’s cut-back for a 3-2 win.
Scale - 10: One of the best performances you've seen. 9: Outstanding. 8: Very good. 7: Good. 6: Average. 5: Poor, 4: Very poor. 3: A terrible day at the office. 2: Abysmal. 1: One of the worst performances you've seen.
1. Allan McGregor - 6
Set a new European club record with his appearance and left exposed with little chance for the goals. Opposite number had a more flamboyant evening. Photo: Gualter Fatia - SNS Group
2. James Tavernier - 7
Captain redeemed himself after a shaky first half hour with the penalty equaliser and a much improved second half. Photo: Alan Harvey - SNS Group
3. Borna Barisic - 7
Should have been sharper for Liege's first - incredibley unlucky not to score a second free-kick this week denied by a stunning save. Photo: SNS Group
4. Connor Goldson - 6
Great header for Rangers' first equaliser, and left exposed for the first and then at fault for Liege's second. Not his most comfortable evening but scored with aplomb and Rangers wouldn't look the same without him. Photo: RUSSELL CHEYNE