hey all

I got a Merc E-300 tht too 2010 model.......luks amazing already.....I just need two modifications (m a total beginner in this guys)

i need the engine noise changed.....not a lot.......more like the E 63s n 5.7 chargers and stuff........what are the cost n wat all parts hv to be modified

plus I already got gud speakers.....but I want to hv lik surround system n stuff.....wat r the options? I am nt sure ifI can chnge them or not cz wen I asked the Merc ppl they said they cant.......I guess i just need to add more speakers or smthn.......which r the best ones? n wat prices?