W123 Service Manual
https://www.startekinfo.com/StarTek/outside/12265/?requestedDocId=12265
After 10 year I would guess for sure you are going to need the lip seal for the inner bearing. If you are careful you will not damage the dust cap and it is reused.
If the anti-static spring is still there it will be in the cap or fall out.
When I adjusted the bearing end play (there is a procedure in the manual) by hand I got it too tight and over heated the grease and had to remove everything and re-grease and use a dial indicator setup which is what the service manual calls for.
I am not trying to start an argument ageist those that do it by hand but in all of the times I have had the front hubs off and used the dial indicator to set the end play I have had zero problems afterwards.
If you adjust the end play by hand be sure to drive the Car a block or to and get out and carefully put your hand on the Wheel and see if it is unusually hot. That is how I discovered I got them too tight.