rearend axle seal

[will]

hello, i have a 91 300sel 175000 miles and i was going to buy a new bmw but they cost so much money that i decided to work on the old benz instead.the car is in good shape and is the most comfortable car i have owned. so i have replaced timing chain,guides on chain and oil pump chain,water pump, radiator flush, new hoses,fixed dash lights,new stereo,new valve cover gasket,idler arm,motor mounts,trans mount,shocks,fuel pump & filter,trans filter,new brakes and rotors,all work done by me with the help of this forum so i have saved a ton of money and thank you guys alot.
now i need a new front flex joint ,and while car jacked up i saw axle leaking at rearend. is this a hard fix? can i get a rebuilt axle and where? or should i just keep it full of oil? any one changed or repaired the axle seal? need some input on this. thanks

[mbdoc]

Axle shaft seal replacement are easy DIYer.


As long as the PINION seal isn't the problem..that requires measuring friction load & not increasing or decreasing that load.

[will]

so do the shafts come out as 1 piece , could someone give me a rough idea on how to get started and procedures on this project. also is there any additive to add to rear end to stop seal leak.