I'm not sure about your model, but some models are specifed to have 60 grams of grease in each hub, 45 in the bearing and 15 in the hub cap. I suspect the specification is in place to prevent overfilling, which can be a problem.

I don't measure grease. I make sure to pack the grease properly between the cage and rollers, generously butter all internal surfaces of the hub, and put a thick layer of grease on the sides of the bearings once they're in the hub. This should work fine. The tricky part is properly setting preload on the bearing. This will have the largest effect on bearing life.

Make sure to change the seal.

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95 E320 Cabriolet, 169K