Hi,
as u could imagine i have actually a 08 E320 SW and in a box i have some HK logic7 spares for S211 : 12 speakers ( SW and Center, 4 tweeters, 4 bass/midrange and 2 rear/surround ) and a A211 827 45 42.
Would that be difficult to do the upgrade as the car as already a NTG 1 command in place (among options have the 388 in place....)

thanks so much
best regards