That's correct, i suspect it's quite a rare colour, the other numbers are option codes, as far as i can make out, Auto+Power Steering, Heavy Duty Heat Exchanger (not sure how this differs from standard?) & left side door mirror (door mirrors were not standard, they were all options
The 6 means it came with a hardtop and the 7 was a US delivery
The interior looks like turquois, but hard to tell from the pictures, the interior colour and whether it was supplied with leather or MB Tex, carpet colour and other options can only be confirmed by the data card for the car, this listed all options when it was ordered, if you don't have it with the car and it's important to you, a copy can be ordered, details where from are on here if you search
It's really interesting to find out more about these cars, well worth the time searching on here using the search function above and the tech manual