Vauxhall ASTRA Owner's Manual page 351

346 Technical Data
Installation dimensions of
trailer towing equipment
with detachable coupling ball
bar,
Estate, Van
All dimensions refer to factory-fitted
towing equipment.
Dimension mm
A 84.0
570.0
B
515.0
C
93.5
D
173.0
E
307.6
F
158.0
G
292.6
H
9
Warning
Only use towing equipment approved for
your vehicle. We recommend entrusting
retrofitting of towing equipment to your
Vauxhall Authorised Repairer.