I bought a 53 foot semi trailer for storage this summer . I work out of town so I did not see it until a month ago .It was missing a battery and buying it for storage ,i did not think it would run at all . I put a battery in it and it started rightaway . It is a Great dane and has a Thermo King refer unit on the front of it . I think the Motor was made by Mercedes . It has 4 cyindlers and looks identical to a motor that was pulled from a thermo king unit I seen on Ebay. Can anyone give me any information about it ? It has a lot of hours on it (20000) which is not uncommon for a refer unit I have been told by the farmers in the local coffee shop (there is knowthing they don't know a little something about) .