HI Olazz,
If your data card reads interior code 246 (grey leather according to our WIKI which I am quite confident is absolutely correct here), and that also matches your current interior - then this is correct.
It is not unlikely that the hardtop was switched during the preownership.
BTW, was your car sold with hardtop? Then it should read 5 or (most likely) 6 in the box 41 (i.e. code 415 or 416).
HT serial number must match "Aufbaunummer" on the datacard, otherwise it is from another car.
BTW (2), horn pad must be black (for deep dark grey steering wheel) or light ivory (for same colored steering wheel). Horn pad color has never anything to do with the interior color, only with the steering wheel color. Everything else is not correct and IMHO "pimp my car"
Good luck
Achim
(w/ black hardtop)