Excess smoke ticket in L.A.

[westadamsvets]

I just got a fix it ticket in Los Angeles for excess smoke from my 300td. I was going uphill and the cop was right behind me and pulled me over.
I argued that the smoke was normal to no avail.
Bottom line, is that I apparently have to go get my diesel smogged!
So what happens now, if I go to a smog check place, are they going to test the emissions?? The car is reasonably well maintained, but a 1979 diesel with a million miles is no Prius.
I don't want to get tagged as a 'gross polluter' or something like that. Anybody has any advice??