c280 , 1994 87k miles

Seem to have a small leak near the front. I've had the head gasket, and timing chain gaskets replaced in last 2 years.

Thought it might be valve cover gasket, but doesn't seem to be coming from there. Right below it towards the front is where it *seems* to be coming from. It is just starting to drip down on the tensioner shock. Wet around the sensor (Cam position sensor?) too.

Any ideas what might be leaking?

Thanks.

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1994 C 280 117.5k, White (Good as new)
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