A lot seems to have changed, so I thought you'd might appreciate a more up to date list of car classes:

TYPE CLASS EXAMPLE OF MAKE/MODEL PSGRS DOORS NO. OF BAGS

ECAR A HYUNDAI ACCENT 4 2-4
CCAR B FORD FOCUS 4 2-4
CDAR B FORD FOCUS 4 2-4
ICAR C MAZDA 626 4-5 2-4
IDAR C MAZDA 626 4-5 2-4
SCAR D FORD MUSTANG V6 4-5 2
SWAR E FORD TAURUS SW 5 5
FCAR F FORD TAURUS ABS 5 4
PCAR G MERCURY GRAND MARQUIS ABS 5-6 4
PXAR H INFINITI G35 5 2-4
LWAR H4 VOLVO V70 XC WAGON NAV 5 5
PSAR H6 VOLVO S80 5 4
LCAR I LINCOLN TOWNCAR 6 4
LLAR I4 CADILLAC STS WITH NAV 5 4
LSAR I6 LINCOLN LS WITH NAV 5 4
XSAR J JAGUAR S TYPE WITH NAV 4 4
XXAR J4 JAGUAR XJ8 WITH NAV 5 4
XCAR J6 JAGUAR X400 WITH NAV 5 4
LDAR K INFINITI Q45 NAV CSR 5 4
LRAR K4 INFINITI FX35 AWD NAV CSR 5 4
LJAR K6 INFINITI QX56FWD NAV CSR 7-8 4
SFAR L FORD EXPLORER 5 4
XJAR L4 FORD EXPLORER 7 4
FJAR L6 FORD EXPLORER 5 4
PVAR M FORD SUPER CLUBWAGON 15 4
FVAR M4 FORD SUPER CLUBWAGON 12 4
FRAR M6 FORD EXPEDITION 8 4
PRAR N6 FORD EXCURSION WITH DVD 8 4
IJAR P LAND ROVER DISCOV LR3 NAV 5 4
PJAR P6 CADILLAC ESCALADE NAV CSR 7 4
CFAR Q SUBARU LEGACY 4-5 4
IFAR Q4 FORD ESCAPE 4-5 4
IRAR Q6 HYUNDAI SANTA FE 5 3-5
MVAR R FORD WINDSTAR GL 7 3
IVAR R4 FORD AEROSTAR 7 4
XVAR R6 FORD FREESTAR 7 4
IPAR S FORD F150 3-5 2-4
FPAR S4 FORD F150 FWD 3-5 2-4
CPAR S6 FORD RANGER 2-3 2
FFAR T FORD EXPEDITION 8 4
LFAR T4 LINCOLN NAVIGATOR NAV CSR 5 4
PFAR T6 FORD EXCURSION LTD 8 5
STAR U FORD MUSTANG CONVERTIBLE 4 2
CTAR U4 MAZDA MIATA CONVERTIBLE 2 2
PTAR U6 JAGUAR XK8 CONVERTIBLE 4 2
CRAR V JEEP WRANGLER 4 2
XRAR V4 HUMMER H2 4WD 5 4
XFAR V6 LINCOLN AVIATOR 6 4
PDAR W MERCEDES C320 5 4
LTAR W4 FORD THUNDERBIRD CONVERT. 2 2
FXAR W6 LEXUS ES300 5 4
PLAR X AUDI A8L QUATRO 5 4
SXAR X4 AUDI S4 CABRIOLET NAV CSR 4 2
LXAR X6 AUDI A6 QUATRO NAV CSR 5 4
XTAR Z6 CADILLAC XLR 2 2

Some classes have CSR added, which as far as I know is Sirius Satellite Radio. Would this mean it's standard on these classes (the built in version)?