Iam planning A trip to colorado soon just wondering if this is A good idea in an 82 240d with 325,000 miles on it. It drives perfect around town and elsewhere, never driven that far yet in it, also how fast should I be going, 65mph it sounds like its going to blow up revs really high I guess this is normal, would like to go faster but not sure. it does seem to vibrate A little bit as well as being A little on the loud side. any info would be great thanks!