Re the possiblity of fitting a 3 belt rear seat so that you could
carry five...
The 'boys in blue' would still find a way to 'have you' as the
logbook states 4 seater, not 5 seater.
Oh and the 3 seat/belted rear was a new customer order/fit option,
or a dealer specified option (for a display/test drive car) or even a
case of "we've not got any 2 seat belted rear benchs available on
or for the production line at the moment, but we do have a lot of 3
seat belted ones we could fit....so we'll just use them".
One of my 2 CDi Passions has a twin belted rear seat and states
4 seater on the V5C (logbook), while the other has a 3 belted rear
seat with the V5C stating 5 seater.