I just paid to get access to the service manual online to get the right torque specs for the wheel bearing hub assembly and a couple other things and going through the manual I found out some of the procedures to do some things are just whack... for example: according to the manual, to get to the sound system amplifier on the standard premium system (not even ML) it dictates that you have to take apart half of the interior of the car including the whole back seat, trunk compartment door cover, light assembly etc etc... just to name a few.... are they on crack?!?!?? I'm pretty sure it's almost the same if not the same as it was in my old 3IS which is basically taking out a couple of bolts and taking some of the clips from the liner and you have access to it. why make it so complicated? or am I wrong and it really does take all that just to get to the amp? I was thinking of adding a sub but not if I had to do all that, screw that lol