Im looking for the name and which kit to get of this vehicle. I saw this on hogans heroes it is a german vehicle the color is a blueish light blackish grey it has two axles at the back and one at the front i also believe its used for carrying generals etc... and it has two small flags on the corners of the hood.

It is the Mercedes Benz G4/W31.
http://www.modelcar.de/news/20050428162020.shtml

Do you know where to find one thats 1/35 and cheap.

PLUS MODELS makes one in resin i think, There used to be a plastic one made by a japanese co. i have a built up one in my display case. both of these kits can be found on e-bay, they both are pricey. if i buy another itll be the plus models, its a much better kit for what you will pay for either one. the plastic one must be over 20years old [motorized] and is strickly a collector kit now, hense the high prices.

Is there nother kit that could be converted into it.

The Mercedes Benz G4 was released as a motorised 1/35th scale plastic kit in the 1970's by Tokyo Marui (sometimes erroneously called Tilt) in the markings of Hitler's official car. It sells for ridiculous amounts now on E-bay. There is also a resin kit from one of the French manufacturers (ADV Azimut, I think), but it, too, is quit expensive.
If you just want a German staff car, Tamiya does a nice Steyr Kommandeurwagen convertible. Two axles, not three, though.