Gary,
You need to be a bit careful of trying to match your car colour to the colours shown on here as every monitor/computer will show it differently. I know I got the wrong green when I ordered some touch up a few years ago.
The paint codes and the suppliers are shown on the vehicle's Body and Paint Number Plate if you still have it on the car.
A way to confirm the colour is to get your data card from the Mercedes Classic Centre in California. They provide then in a matter of days on request for free.
Having said that, the codes here are correct and the painter needs to go to the paint suppliers and explain that the code is for a Herberts paint and can go the the following site who will provide the formula.
http://www.standox.declick on "Farbtonsuche"
select your language
click on "special search"
select "passenger car", click on the forward arrow
select "MERCEDES", forward
enter your color code; e.g. 180, forward
select "Basislack", forward.
Cheers
Garry