MODERATOR'S NOTE 1: This video illustrates the process on a W201 model, but it should be the same process as done on the W124.
MODERATOR'S NOTE 2: The adjustment procedure from the factory manual is in the attached PDF file. Note it is critical to fasten the brake rotor to the hub using at least 1 lug bolt opposite the "locking bolt" as shown in step 1; multiple lug bolts would be preferred. If this is not done, the resulting adjustment can be excessively tight and result in premature bearing failure.
Just did a video ,showing off my new bearing packer tool..and put abit more info in the video,,to show how you can regrease the front wheel bearings
I hope it can be of any use.Greeetings