The transfer case oil can be changed, and there is access to it- HOWEVER- I have no idea how! It is an itemized service offering at My Mercedes Benz retailer service dept (about $259.00). I would best suggest searching around on this Forum!
Don't hold your service facility responcible for wanting to replace it, they see a leak- they want to fix it! The dealers DO NOT rebuild transmissions, angle gears, drive shafts, axle boots, rear differentials,or transfer cases! They Just REPLACE! Cut them a break, I DO! However, the problem lies in thier ignorance and lack of TRUE knowledge of the product! So what if it leaks! Has anyone ever looked at thie rear differential lately???? Case Closed! All In All, just monitor the transfer case- Keep it clean- and retorque when possible! I am sure this unit is re-sealable by a knowledgeable shop!
