January 27th, 2008.
Dear Sir:
I would suggest getting the shop manual for your truck from the Mercedes dealer, as I did not know Uncle Sam had the U500's. I would direct you towards Mr. Michael Smith at United Parts Service (Unipaser) in Palo Alto, CA, as he has been a wealth of information and an
Unfortunately for all of us, the Mercedes Benz parts aren't going to get any cheaper with the weak buck on the international market, so if you want your truck to run right, just grin, bear it and shell out. At least the 404.114's were fairly simple and fairly robust, as trucks went, and other then a dose of very bad gas here in Texas, mine's been really reliable as a daily driver.
Does your U500 have the rather strange throw out bearing assembly accessed and repacked through the transmission shifter hand hole in the back of the cab (like the 404.114)? I always wondered what German Fritz Goldberg came up with that one, with no alemite or zerk fittings, and the need to repack once or twice a year, it must've made the MB truck mechanics happy and wealthy men.
I am certain Unipaser can help you get the manual(s) and parts you need, now just find a good, skilled mechanic if you don't like working on them yourself. A mercedes guy would at least have the right mindset.
GOOD LUCK,
Sincerely,
Kyle F. McGrogan
1963 Mercedes Benz Unimog S404.114 (Swiss)
1971 Kaiser Jeep M35A2 Wo/W "Saddam's Nightmare" Vietnam and Desert Storm Veteran Deuce Truck