I saw this and it brought back memories. One tank full and the other empty......oops. You learn fast that there's a switch you need to have opened up to use both tanks....and check the vent.Hi,
I am new to driving a truck. Just purchased this Freightliner Columbia, with Mercedes engine, has duel 70 gal tanks. The fuel gauge seems to be reading off the drivers side tank, but when I stopped to fill (gauge read 1/4 tank), my pass side tank was still full. I saw some posts about a clogged vent as a possibility, but when I open the pass side tank cap - should it not then allow it to equalize? or does it use a transfer pump? Any advice appreciated!