Vauxhall COMBO Owner's Manual page 165

Red button must spring up when safety
cap engages. Check that protectiv e cap is
firmly sea ted.
Imp or tant
Tra iler operation is only permitted if
z coupling ball b ar is correctly engaged ,
z and protec tiv e cap has been put on and
eng aged.
Towing a c aravan/trailer is only
permitted w ith a properly attached
coupling b all bar. If the coup ling ball bar
cannot be properly attached, consult a
workshop . We recommend that you
consult y our Vauxhall Authorised
Repairer.
Eye for break -awa y stopp ing cab le
For carava ns/trailers with brake, attach the
break-away stopp ing cable to the eye to
the right of the coup ling ball bar; see arrow
in figure.
163