RichB - bear in mind that all current cars have wider rear track than front track - up to five inches, so don't get caught out as I nearly did. Measure across the rear wheels for a true width.
I got caught ordering a trailer to rent, as DW says they have wider rear ends...
Maximum Width stated on the MMC Website:
4/4.........1.630m
Plus 4......1.720m
Roadster..1.720m
Plus 8......1.751m
And to Compare,
Golf 2015....2.027m
So they are all "slim", but some more than others!!