1992 300CE (M104 CIS-E)

I am trying to help my neighbor, she just purchased the car above. After about a week of driving it, there is a coolant leak. It only occurs when running, and starts a pretty good steady stream after about a minute or two. I jacked it up and looked from underneath, and removed the air cleaner assembly. The leak is on the passenger side. It looks like the leak is from somewhere above the starter, between the oil filter and cruise actuator area. I can see a hose in there from above (right between cylinders 5 and 6), that appears to connect to the block, but cannot see the rest of this hose to verify it is leaking. I suspect this hose, but not sure. I have searched and seen some mention of this hose being difficult to access, and requiring intake manifold removal. What if the starter is removed, can this hose be accessed from underneath? I could not find any good pictures showing this area of the engine, and I don't have the service manual for this car. What is this hose? Something for the oil cooler? The car has the cartridge type oil filter housing.

The car appears to have been neglected for the past few years, I already fixed some broken wires and found missing insulation, so I am aware of the dangers of disturbing the harness. I would really rather avoid taking off the intake and creating other headaches. Shall I remove the starter first? Please respond with your opinions and experiences in this type of leak. I don't think it is the headgasket. I didn't see any evidence of coolant in the oil or vice versa. No oil was leaking, just a good stream of coolant.

I appreciate all your help!! And so does my neighbor...