Opel ASTRA K 2015 Owner's Manual page 248

246 Vehicle care
Disengage the fuse box cover and
remove it.
No. Circuit
1 –
2 –
3 Trailer module
4 –
5 –
6 –
7 –
8 –
9 –
10 –
11 Amplifier
12 Front seat heating (on vehicles
with alarm horn)
13 Rear seat heating (on vehicles
with alarm horn)
14 Ignition
15 Seat ventilation
16 Trailer outlet