Yesterday i bought a 2006 c5 HDI for dirt cheap. Upon test driving it and inspecting it i could not see any leaks, just a couple of rusty brake lines.
Drove 500miles home across country and there was no issues except for mild occasional knock from the rear (probably bushings).
I went out today to get my summer tires as the car only came with winters on it. Came home and threw it in highest position for changing the wheels, and noticed light rain from the rear right. Seems to be coming from the topside join between the strut and accumulator. Quite a bit managed to escape before I had time to throw my jack under and lower the suspension to the lowest (i think about 2-300ml). there's no leak when it's in the lowest setting and it pulls the arm back up just fine.
Are the o-rings on the accumulator a common failure point on these? Or is it more likely the strut itself? Pictures and video below.
