CD Short take on GL550
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1992 500E, 2006 E500, 2007 GL 450
CD Short take on GL550
Essentially their conclusion was that less is more and they preferred the 450 or 320 to the 550 saying the extra power was superfluous in a large SUV. While my 450 does not feel underpowered, it seems to me that a 2 second advantage in 0-100 run would be a substantial plus for the 550. However I was surprised that their 450 got 20% better mileage than the 550. I would have thought that mpg would be very close. MY GL has averaged 17.6 mpg over 5000 miles of mixed driving. I thought a 550 would be in that range if driven similarly.