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Could you compare the GS's road noise to another car perhaps?
Here are my thoughts based on cars I have owned recently:
2000 Honda Accord V6: GS much quieter
2003 Acura TL-S: GS quite a bit quieter
2005 Acura TL: GS slightly quieter
2005 Honda Odyessy: GS much quieter
Don't forget the tire type and condition has a big effect on noise too. Why not just drive some GS's and decide for yourself?
I would say out of the 100+ different cars I have driven in my life, the GS is in the top 10 quietest, maybe top five. The most silent I have driven? 2001 LS430
Wow rominl the new 330 is much louder? I wouldn't have thought that, interesting.
well, i drove the one at the lexus event, and it was load. it's like no engine noise isolation, and the road noise was pretty bad. quite a bit worse than my is300
IMHO unless you are trying to keep the entire car stock the money you spend on the ML system could be put into an aftermarket system which would make the ML sound like a transistor radio. .......let me get my flame suit on......