Yup - there's the 0+ baby carrier (rear facing), one for 9mths to about 4yrs (forwards facing, with a big support accross the front), and one for the 4-11 year-olds (which can be used just as a booster cushion later on). Ages are approximate (and notoriously optimistic, a practice common in the child seat business apparently. All three are best used in the rear (there are some well-known safety issues about babies and front-seat airbags).
All three SHOULD be available in strap-in or ISOFIX versions. I say SHOULD - just because I spent the money on the ISOFIX brackets the blooming baby carrier isn't available now I need it.
I can dig out the catalogue numbers if it helps ....
Ordered my "S" August '01. Arrived July '02. EB with white roof, wheels and stripes, Chili pack, DSC and climate control. Hate those 17" runflats though.
Can now be seen all over the West Midlands, as a blue blur passing everything at speed