This is the OM621. I removed the fuel lines and valve cover.
I've started whunter's list by draining radiator and the remainder of the oil. I removed the oil filter (there seemed to be a bit of watery oil in there). I believe I'll need a 27mm deep socket to remove the injectors. I assume I have to also remove the glow plugs.
The bolts holding the head on seem fairly straightforward on the driver's side. On the passenger side however I think I'm going to need a hex head with a long shaft to get these out. My regular socket hex head won't fit in there. Since I have to torque these again, what tools is right for a torque wrench. Perhaps there's a longer hex socket?
Tonight I sprayed down the bolts on the exhaust with penetrating oil. Any tips on head removal for this OM621, of course I've never done this before but I know I can do it.