I've only had to go to the MB stealership once but i just used a VIN i found off of copart. You can also find them on any salvage auction site. I used Poctra when I was in Ukraine.

Anyways here's one - https://www.classic.com/veh/2004-mer...kgAn?tab=specs

2004 SLK32 VIN - WDBKK66F34F301980