Hi all!
We have a slow coolant leak on my sons 1988 300TE.
I think it is loosing about a quart a month... we get the warning lamp and I topped it of and then a month later the same.
I looked all around for where it was going, and kinda felt it might be the heater matrix. I kept getting a wiff of antifreeze in the engine bay and sometimes the interior... but could not see anything until yesterday.

I was under the car looking for the scource of the oil drip we have, and I noticed antifreeze on the crossmember.
I looked up and there was a trace of it on the side of the engine block, exhaust side. I looked up further and the highest spot I could see was right next to the firewall,on the lower exhaust manifold stud/nut on #6... just a drip hanging off the bolt head.

Now, could it be the headgasket weeping or is the another coolant line or vessel there?
If it is, would retorqueing the head work... it does on my Alfa Romeo's!
Could this also be the reason we get an intermittant misfire when the engine is really hot... coolant weeping into a cylinder when under pressure?

How bigger job is the headgasket and at 65,000miles, what else might need doing IF it needs it?

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2009 Mercedes ML320 Bluetec