Rattle Noice

P.S... This vehicle is also one of those that has the balance shaft issues..so...is this sound the beginnings of the end for the motor?? I have not addressed this because the only symptom of this balance shaft issue is the "Check Engine light"..Otherwise the motor runs great.
I would rule out motor mounts for now, that is usually more when you are stopping/starting
Like onyx said, something up front is worn out. Could be either control arm bushing, tie rods, end links, strut mounts, blah blah blah
if too lazy to check yourself, pay someone an hour of labor at a nearby shop to inspect for you. doesnt have to be a benz specific shop either. even your local Amigo Discount Auto Repair will be happy to do a front end inspection for you, in my opinion less likely to rip you off too

I think it might be the transfer case... I jacked it up and spun a wheel and there was a lot of movement of the wheel before it caught. When I come to a stop there is a definite clunk







