If you repack the wheel bearings, you'll need inner grease seals too. There's really no way to get the inner bearings out without prying the seal out.

IMO, it's okay to switch brands of grease as long as you don't mix them. In other words, get everything really clean.

Have fun!

__________________
D.H.

04 ML500
02 E430

Experience is something you don't get until just after you need it.