04 Columbia Fuel System?

yep, good way to find.

really MB fuel system is one of the best, becouse it let truck run with air in fuel, warms up fuel in engine block to optimal for PLD units temperature, cools ECM and warms fuel tanks.

PLD pump units are installed in engine block, fuel never goes out there and this place keeps warm when truck sits under cold weather, that's why MB engines start when other not, especially when temperatures are below zero

 

do this bleeding only if engine stalls running all fuel....

but I'd check intake lines, becouse if they have some damage you may have problems to start engine up next morning

 

I am having perrty much the same problem with my MBE 4000.I loose prime when I shut it off.I have a primer pump that I hook up to the fuel filter and pump fuel into the system.Now when I do that I hear and see bubbles in the left fuel tank.My shop is going to replace the check valve at the back of the engine.I hope it helps.Any advice is welcome. My truck is an 04 Columbia

 

IF mbe is similar to dd15, i had a similar problem that ended up being the low pressure pump itself letting in the air gears in pump were worn. truck still pulled 100k no problem got to a point were i didnt shut it off due to hard starting

 

We are going to change the valve at the back of the engine first then see what happens from there.
I guess I shouldn't complane about my engine to much as it has over 935,000 miles with out an overhaul

 

it is pressure limiting valve. ball + spring. when pressure is over 4.5 BAR it lets fuel come to return line