I downloaded the CLK430 owners manual on google and it says that theres heated seats. I was looking at the picture for where the buttons are at but I dont have it on my car. Does the 2002 CLK 430 coupe not have heated seats..?

My car has them. Heated seats must have been an optional extra, not a standard. convenience.

Its a option...if its not there then no

They came standard on the CLK55, and were available as either a stand alone option ($635), or as part of the K4 package ($1,580). But as others have said, if you don't have the outer buttons in this photo, you don't have that option.