Ivanrad

I have a 2001 c320 with 120k miles shifts perfectly and nothings wrong with it so far. i was wondering if service B is a DIY thing if possible. I performed an oil change with my mustang a few miles ago made sure i did everything correct now i know my cars running well. Is service B cheaper and reasonably easy to do if you've got the proper parts. Please let me know everything i need to change or know tips and tricks etc. I looked at my cabin air filter and its perfectly white. Thanks all