[Redman]

Let me put it this way:
Daimler-Chrysler (i.e.,Mercedes) engineers put ALOT of time & effort into designing the 300C to deliver a very high-level of performance. Everything on the car's suspension, brakes, ESP, etc, is carefully "tuned" to work together to deliver that performance. No small achievement.
Now, the DUB-driven industry, with all of its engineering expertise (not), steps in and says, "we can do it better" - "just watch" while we take some of the most critical variables (wire & tire weight, tire size, etc) and throw them into the mix.
To be sure, the amount of money charged might lead you to believe it has to be ok, but is it?
Figure the odds - itz your call.