This is asking a bit much for a wiki and you could probably find this elsewhere. No need to reinvent the wheel, ehh?
I think it would be best if you submitted this as a web search for immediate information needs. Alternatively the store which sells you the replacement parts may give you a print out with directions and necessary diagrams.
I will add this advice though; this task will require a few special tools; bearing puller, grease gun etc; these are likely available for rent as a kit from the retailer selling you the parts. I recommend you phone around first and find a store where all these things can be had in one place. When it comes to auto parts, service is more important than convenience or low cost, go with the place that is most helpful.
you need to remove the entire steering knuckle and have a machine shop press out the hub and bearing for you.
Remove the tire and wheel. Remove the axle end cap. Remove the wheel bearing retaining nut. Remove the wheel bearing seal. Remove the wheel bearing. Reverse the process to install the new wheel bearing.
Begin by removing the rear tire and wheel. Remove the end of the axle. Remove the wheel bearing nut. Remove the wheel bearing seal and the wheel bearing.
Remove the tire and wheel from your 2004 Mercedes 240. Remove the end of the axle. Remove the wheel bearing nut. Remove the wheel bearing seal and the wheel bearing.
Remove the tire and wheel from your Mercedes-Benz. Remove the axle end. Remove the wheel bearing nuts. Remove the wheel bearing seal and the wheel bearing. Reverse the process to install the new wheel bearing.
Remove the tire and wheel from your Chevy Lumina. Remove the end of the axle. Remove the wheel bearing nut. Remove the wheel bearing seal and the wheel bearing. Reverse the process to install the new front wheel bearing.
Remove the tire and wheel from your Chevy Cavalier. Remove the end of the axle. Remove the wheel bearing nut. Remove the wheel bearing seal and the wheel bearing.
Remove the tire and wheel. Remove the axle end cap. Remove the wheel bearing nut. Remove the wheel bearing seal. Remove the wheel bearing. Reverse the process to install the new wheel bearing.
Remove the tire and wheel. Remove the and to the axle. Remove the wheel bearing seal, with a seal puller. Remove the wheel bearing. Reverse the process to install the new wheel bearing.
Remove the tire and wheel. Remove the axle end cap. Remove the wheel bearing seal. Remove the wheel bearing. Reverse the process to install the new wheel bearing.
Begin by removing the tire and wheel. Remove the and of the axle. Remove the wheel bearing nut. Remove the wheel bearing seal and the wheel bearing. Reverse the process to install your new wheel bearing.
Remove the rear tire and wheel. Remove the axle end cap. Remove the wheel bearing seal. Remove the wheel bearing. Reverse the process to install the new wheel bearing.