Hey so I just got my 2011 C300 sport about a month ago. I love it but it's a base and I was wondering what upgrades would you guys recommend performance wise?

 

lol nope, there is little to no aftermarket support for our cars other than high-end exhaust systems and suspension (springs, coilovers, air ride)

 

There really isn't anything. If you really want to do something performance wise, you can get an ECU tune, although there doesn't seem to be ANY hard dyno numbers to back up any claims of noticeable HP/TQ difference. You could get exhaust, but don't expect a big difference there either. But atleast it will sound cool!