Fonzi03

Having a hard time finding info about the w218 and xentry. Hopefully someone can shed some light on it. I see on older models people have founds some mods that work well. Can anyone point me in the right direction for our cars, like lowering, speed limit, possibly remove eco on startup?. Trying to see if it's worth dropping 900ish on it from one of the china resellers with a Lenovo tablet. Any and all input is appreciated.