My Friend Has A 300 E And She Purchased A Stero For It I Cant Find An Instalation Kit For It Is One Needed? I Havent Looked At The Car Any Help Would Be Appreciated Thanks

Do a search for it. There are probably tons of guides. i think there may be one on the main website, mercedesshop.com under do it yourself. i think there is also an audio forum too. might wana try there m8