Good morning,
I can't remember who, but someone on the forum a few months ago, said there was some parts recommend to absolutely have for an extended cruise…
Possibly something about a solenoid or may be a fuse? Can't remember.
Also please don't hesitate to let me know which parts you would stock (aside hoses, belt, injectors, thermostats, filters)
I was also recommended (by a Volvo mechanic) a spare starter and alternator (12 volt).
Sincerely, Alexandre