Interior switch bulbs, voltage

[Jay's MK4, Euro Stylee!]

Hi,

Im so damn skint at the minute, due to temporary unemployment, that i can only afford to do the smallest of things, even tho i have absolutely no money i cant not do sumthing to my car, its an addiction.

so im busy changing all the LEDs in the switches n dash, but im just wondering if i will need resistors for the LEDs as the 3mm n 5mm bulbs u can buy are all 3.5 volt, and obviously cars run 12v. are there already resistors in the circuits for interior switches or are they still recieving 12v?

i know that probly made v. little sense but any help would be greatly appreciated.

thanks, jay.