I need to do some maintenance on my C300 and it has 38k miles on it.

I need to change the battery (getting a light to charge it). Mercedes says ‘No let me do it as the system is to complicated and you may mess it up’. Me do it or let MB?

Spark plugs. Me do it or MB?

The A/C Blower Motor Fan. Me do it or MB?

I can change my own air filters. That one I do know.

I also need tires. Looking for All-weather versions. Suggestions?