For the manual transmission and differential they should have a fill and drain plug on them, locate both, open the fill first (to make sure you can get it open), then drain the fluid, and refill with a good quality gear oil.

With only 61k its unlikely that the front bearings will need any service....I am not sure how they are designed on the new cars like that, but I bet they don't need any work for quite a long time yet. My bearings on my W126 went over 250k with no issues. You could remove the oil seal and re-pack/re-grease them, but the bearings should be fine. Get a good seal puller to get the seal out of the hub.

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)