Hello - other members will likely have great suggestions as to what tools would be best to have for W211 fixes. Since you're going to be working on the car yourself, take a look at the link below to our site's DIY tech articles on this platform. Everything is grouped by category with detailed instructions. This will save you a lot of $$ and headaches when trying to troubleshoot. Please let us know if you have any questions and best of luck!

Mercedes-Benz E-Class W211 (2003-2009) Technical Articles - Pelican Parts