If you have more time than money, DIY is the best route. Once you've done them the first time, it's a snap on subsequent installs!

My 10-yr. old daughter even does the pads when I let her...

btw, the rotors on your car are softer than on other makes on purpose. They are also designed to be replaced about every two to three brake pad replacement intervals (MB rotors are cheap for that reason).

Also, Invest in a decent set of metric allen and torx sockets. Absolutely necessary when working on these cars...

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car