unfortunatly on the mk5 there wernt too many variations because of the limited run (especially the gti`s )
the mk5 is classified as a 6n2 or 6nf
in the latter the f stands for facelift because the mk5 is the same shell with a few minor external diferences, a few electrical diferences and a whole new interior.
the electrical diferences are too little documented to list here but a good example is the switching of 2 wires in the rear light connecters (which are the same)
the main external diferences are:
the bonnet and grill
bumpers
doors (but only that the mk5 have holes for the rub strips)
boot (it slightly changed 1/2 way through mk4 too)
rear glass
windscreen mounting technique (among other minor deatails)
rear lights
etc
on the mk5 the main options are things like engines, trim level, sports kits and wheels etc
the offered engines were (IIRC)
1.0 8v (50hp)
1.4 8v (60hp)
1.4 16v (75hp)(also exists in a 100hp version but visually identical)
1.6 8v (??hp though i get a feeling its around 80)
1.6 16v (125 hp) (uses a form of variable valve timing to achive this but only on the inlet)(this is the GT
i )
The diesels were i think
1.9 8v (64hp at stupid torque
) (this is the SDI)
1.4 6v (75hp 3-cyl) T
DI
im pretty sure there is a 1.2 as well but i cant remember the specifics
on the inside tre was air con, leather (i think), diferent stereos some with a 6 disc in dash changer) a few seat designs for more support and obviously in other colors and the obligitart power windows and/or roof (for car fitterd as such)
there was the sports package available on some models that gave diferent wheels and slightly lower suspension (gti is already lower by 1" i think)
thats just about all the options that i can think of besides color which also came in perl or met. if any one else can think of any thing please add to this post
thankyou for reading
)
but iirc josh mentioned that he had cloth so maybe some and maybe none 
