Im just curious if its even possible to open and change the bulbs on a 2005 CLK 320. and if so does anyone here know how to or can direct me to a site or forum that can-thanks

should be instructions here, do a search. Do you have Bi-Xeons or regular bulbs?

regular as of now I bought Bi-xenon's

To just change the bulbs, there are instructions in the cars manual. If you are wanting to install aftermarket Xenons I believe there are several writeups around here. As well as writeups for a total headlight swap to the Xenon lights. Just do a search for it.

Also try looking here: https://mbworld.org/forums/clk-class-w209-43/