I know this is not completely diesel related but still worth it. I had the option sheet run on my car today at the dealer (for free) and I came across this site when I got home. It has all the option, paint, and interior codes that Mercedes used. Kinda interesting having it now as my car had the first aid kit deleted yet I have a first aid kit. Well give it a look over, most of the options are on the steel plate on the radiator support so you don't necessarily have to go to the dealer if you don't want to.

Mercedes Codes

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Adam Lumsden
(83) 300D
Vice-President of the MBCA International Stars Section