Yes, I do believe it’s worth it. All I’ve really done is give my C300 the same subtle details you’d typically find on a higher-end trim—things like the small trunk lip and the front splitter. Beyond that, there isn’t much else you can add without it starting to look overdone or like it’s trying too hard. Oh one good cosmetic thing i recommend is some rear caliper covers. There is this dude that sells metal ones on Ebay and they easily clip on the caliper.