The mobil 1 synthetic gear oil comes in a tall pointed bottle with a little tip on it, works perfect for putting it right into the diff. Yet another reason to use Mobil 1  You just squeeze the bottle and it all squirts right in there, I didn't spill a single drop when I did it, and it was with no pump at all.  So far I have changed it twice on both cars. Differential's are way quieter and smoother now. Huge difference!
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-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)
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