Hi
w123 200 petrol

not driven her for about a month had to jump start, started up fine but once the engine was warm had a bit of smoke kind of black to white colour from under the exhaust manifold. Engine temp stayed fine and no smoke from exhaust itself…
funny kind of smell can’t distinguish between oil or coolant or maybe both!

did notice a big button size oil stain on driveway.. no noticeable oil leaks on that size of engine bay.

hard to pinpoint where, hoping it’s not head gasket, rocker cover gasket was changed when I last did valve adjustment (1/2 years ago)

any pointers? Advice? Caught a bit of the smoke on video. Safe to drive?

https://gifyu.com/image/SxuAM

looks to be leaking down here any ideas where it’s coming from? Will degrease and see if I can find the origin