OK I need some brains here. I am buying my friends near Mint 93 300TE and the big flaw is that at high speeds it seams to leak fluid from the pressure bleed valve at the top of the transfer case on to the exhaust, not at low speeds though. My friend thinks it could be a bad pressure valve or the system needs purging. I have little 4 matic knowledge and could use some expert advice. It leaks most of contents out over 500km highway driving.