There’s a powerful sense of urgency in getting this Curbside Classic written. It’s to document the remarkable horde of old Mercedes W123 diesels hereabouts, most of them proudly sporting a biodiesel sticker.  But the biodiesel fad was already waning substantially when I shot this car a year ago. And since the $1/gallon federal subsidy for biodiesel disappeared with the new year, biodiesel itself is at risk of becoming a CC (canola classic?). Congress is currently considering a renewal, but regardless, Mercedes W123s will still be around. In fact they may well be the last internal combustion engine cars running long after Peak Oil is a distant warm and fuzzy memory. Without being uncharitable, these cars are the automotive cockroaches: they’ll eat the grease out of your dirty frying pan, and you can’t hardly kill them. (Read More…)