Based on work experience on insuring both domestic cars and foreign cars across Europe, steering wheel locks are simplest (and best when big and bright and visible - not ye olde krook locks to the pedals) deterrent overnight if you are concerned given you know where you are going
Most of our cars are not worthy of theft, but the parts trade for modest cars is alive.
We believe these work as twice in the last two years (that I know if) we had similar neighbouring cars stolen, but my colleagues one weren't.
His could have been the wrong colour, ages, spec etc, but to me it's enough evidence to recommend or insist. Losing your company car really buggers up a business trip, so my people seem to listen
Never, ever, never leave anything in the seats even during the day and esp overnight, bags, coats or shop purchases etc though.
Even for a coffee break.
Motorway services in France can be targeted.
Stuff should always be in the boot or better still, with you. Park the car visible if it's not a domestic one.
We still have a fair few broken windows and stolen items, despite audible alarms depending on where and when
But in the scale of things and the volume of trips involved, it is still a rare occurrence. Just really really inconvenient
