Adding:
When doing a brake job, be sure to clean the surfaces on the calipers where the pads rest. The smoother the better. I don't know if the E-series uses stainless steel clips like cars (no such experience yet for me) clips or no clips, make sure the resting points don't have burrs or swells of rust because you don't want the pads hanging up on them.
As previously mentioned by others, you want to repack the bearings and caliper slides.
On vehicles where the rotor is a separate piece from the hub, make sure the mating surfaces are clean and free of rust to prevent accelerated rust formation. Rust between rotor and hub will swell, then warp and might even crack the rotor. I've seen it happen. Clean surfaces offer full contact which also assures the new or cut rotor will not wobble on the hub.
I personally like to carefully smear a "very" thin coating of anti-seize where the pads rest on the calipers (when there are no stainless clips) and between rotor and hub. I always clean the stainless clips to shiny new using 0000 steel wool.