ive always had problems with their audio setups. they either use a single wire for everything or entirely too many. everything there is proprietary and they love integrating stuff into other stuff that doesnt belong in the other stuff. like the hvac controls into the radio panel. so if u yank the radio uve gotta now build a new panel for the hvac buttons or display and stuff. HUGE PITA. if you take a run of the mill E320 theres no mods for it other than like APC’s universal spoilers or light bulbs. unless its an amg, upgrades on their cars are meh, at best. my friend’s on his 2nd benz, i hate his car. we tried to find some light bulbs and theyre like 70 dollars a piece. thats absurd. just that kind of stuff. and they kept telling my friend that he has to buy special kind of tires, special size and all that bullshit and only from the benz dealer. i was like WHAAAAAAAAAAA? dude, theyre jsut tires, match the size to your OEM shit and ur fine.