Opel ASTRA 2014 Owner's Manual page 79

Fold out tail lamps
Fold out both tail lamps.
Lock the rear carrier system
Swivel both clamping levers
sidewards as far as they will go.
Otherwise safe functionality is not
guaranteed.
Fold out wheel recesses
Fold out both wheel recesses.
Storage
Assembling the bicycle rack
Lift the rack at the rear (1) and pull it
backwards.
Fold up the rack (2).
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