If you purchase the kit as we suggested it includes everything that is needed to complete the repair. You may need an extra quart of fluid, but that is it; figure about three hours, at the most four to complete the conductor plate replacement. It is best that they are experienced with this particular transmission Mercedes 722.6 also referred to as a NAG 1. It can be a little tricky getting the pilot bushing seated correctly (electrical connector) and if not done properly they will ruin your brand new conductor plate.
Best to get some rat/mice traps in the garage. Those pest will cause a variety of difficult problems to rectify. Good Luck!