Volvo 2008 C70 - Manual (Page 148)

06 Starting and driving
147
Detachable towbar
06
NOTE
Check that the towball section is secure by
pulling it up, down and back. If the towball
section is not fitted correctly then it must be
removed and refitted in accordance with
the previous steps.
IMPORTANT
Only grease in the towball for the towing
hitch, the remainder of the towball section
should be clean and dry.
G020309
NOTE
The trailer’s safety cable must be secured in
the towing bracket’s mounting eye.
G020310