Working on a 2008 Mercedes E350. We diagnosed an issue with the transmission that was causing it to shift hard and flare up at times when driving. We also diagnosed an issue with the keyless door locks were not working at times and inspected for needed maintenance. We completed an automatic transmission service with new filter due to a leaking pan gasket and it being low on fluid. We also completed the Mercedes E service scheduled maintenance, replaced the front brakes with new rotors, wear sensor and ceramic brake pads, we bled and flushed the brake fluid system and we replaced the crankcase breather valve and the camshaft end plugs.