I always used DIS on our 4.8is to calibrate the suspension. There is a whole diagnostic/calibration routine that tells you exactly what to do and when. I found it very easy to use. Just make sure you use the proper measurements mm/cm. I messed that up once and it maxed out the suspension... Looked goofy as hell all jacked up.

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2005 4.8is Le Mans Blue
2011 35D Space Gray