Could anyone please tell me or show me a diagram of where the freeze plugs are on a 1992 300 sl .I am leaking coolant.Im hoping it is from the water pump but as far as I can see it is dry.The coolant seems to be dripping from the oil pan gasket so it must be coming from above on the drivers side of the engine it looks like the vicinity of the water pump but I cant see up in there from undrneath.I have a new water pump coming so I will try to replace that anyway since engine seems to be running extra hot in traffic.But I wanted to check the freeze plugs also seeing the car has 219,000 miles on it.Thanks for any help you can give me. Peter

What engine is it? it might be the hose coming from the firewall out of the heater core into the engine block. typically you can see the coolant spewing out once the pressure builds up, or you can go out and feel for wetness while the engine is cold. the hole might be near the hose clamp, but just go look around the area for signs of leaking,. if you don't see anything, turn the car on and let it get up to operating temp where there is pressure in the system then go look at the hose.

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1990 190E 3.0L

The motor is a inline 6, ( M103 with a M104 type 24 V head )

I'm pretty sure the only freeze plugs are on the passenger side ( right side ) and maybe in the bell housing area.

The only real way to check for leaks is to pressurize the cooling system to ~ 14 PSI then look for leaks.