Congratulations. I see you have a Sprinter-based chassis by MB. There are several recent (some of them mine) threads here regarding Sprinters. Read your owner's manual thoroughly.
Your MB Diesel V6 Turbo is probably very similar to ours and you should know about engine and transmission oil along with the maintenance schedule. Your unit may use DEF (Diesel Exhaust Fluid) and/or may have a DPF (Diesel Particulater Filter). Check so you know for future reference.
I recently investigated the fuse panels in mine and there are a lot of them.
Search the threads on this forum and you will find a plethora of information and a lot of helpful people.