Welcome to the MB Diesel (& SDL) fraternity.
You are in the same position I was 4 years ago - although I did get a PPI.
My car also hailed from Texas and after buying it I had a great 1750 mile drive home - although I did pick up a $300 speeding ticket in the DFW area. Darn car is so smooth at 85! If you ever need service or advice in Austin I can recommend Ben's Workshop. They did the PPI and a few items I wanted done before picking the car up and they were fantastic to deal with.

Sounds like you have a GREAT buy and with such low mileage you should be able to look forward to many happy years enjoying these great cars.

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1991 M-B 560SEL Arctic White/Grey 99,000 Miles
1987 M-B 300SDL Ivory/Palomino 229,000 Miles (sold but never forgotten)
2006 Volvo XC70 Blue/Beige
1999 Porsche Boxster Arena Red/Savanna Beige
1986 Porsche 928S Goldweiss/Brown