Are you sure you are looking in the right place?
I mean, not to be rude at all, I just want to help and clarify for you....but most e46s should have cruise control.
Or is it an option?
The cruise is on the stearing wheel....
Does your stearing wheel look like this?
If there isn't anything on the stearing wheel....you DON'T have it.
He's probably right.
In that case, I've never heard of an aftermarket cruise control.