Got this car a month ago, I was reading a lot about it. My question is what can be done to improve its functionality and appearance. No need for HP or other stuff as it will break my warranty.

I am talking about grounding wires(still didn't get what they are for?), maybe Mercedes L shape leds as 2009 model dont come with small round daylights, headlight/backlight tint, maybe any RECALLS and other stuff. Please recommend me from your experience. Thank you.

 

leave it stock, its the best thing you can do for a car

 

Welcome to the forum. I make and sell grounding wires. Info here: https://www.myg37.com/forums/misc-ve...ing-wires.html

 

first and best thing you should do to improve the appearance is to lower the car. Then from there its up to you.

 

could look into the 7AT shifting issues too.

 

Last time I check a cat back or intake will not break your warrenty? But you can drop it and do some easy bolt ons and be happy.

 

 

drop, intake, exhaust

 

Neither intakes nor exhaust will alter your warranty. I've had my exhaust installed by the same dealer that I use for any other things. Warranty is good, and they actually like the exhaust. And, therefore, my recommendation: Get an exhaust! Since you're not worried about the HP factor, just go with whatever you like in terms of sound and looks. Just research it before making a final choice to buy. And, again, since you're not worried about HP, getting intakes is pointless, 'cause you'll never see them; getting High Flow Cats, Test Pipes or anything similar won't matter, either, because you can't see them and their main purpose is for adding HP. Get what you can see and hear, while keeping the look of the car clean.