The revenue came from those who bought new cars, me thinks.
The plaques smack of marketing
PR from the days when people were proud when their cars hit XXX,XXX miles or km.
I wonder if there is much appeal for these outside the diesel owners group? I never see many cars with badges these days and there are lots of MB's on the road in No Calif. I used to see a 123 diesel locally with 4 or 5 different badges on it and I wondered if the air flow wasn't being compromised?
I also received a couple of the nice big boxed certificates and plaques, they are impressive aren't they? I plan to put them high on the grill (when and if I get around to it)