It’s leaking from the junction of the hot side solenoid and valve. I guess it had dried when I was looking for the source. It only leaks during cold loads so maybe it’s a directional leak only when there’s pressure on the downstream side of the valve. I’m not sure that even makes sense but it doesn’t leak when not in use nor during warm loads.

I appreciate the tip!

Sixto
05 E320 wagon 173K miles