[ainarssems]

It does not sound good. My friend did similar thing on older C4 A6 with 12v 2.8. Lost coolant, kept driving, overcooked engine, oil burned on in heads blocked oil channels and stopped supplying oil to camshafts which started seizing up from running dry, cambelt jumped couple of teeth because of extra resistance on camshafts. Engine gradually started running worse until stopped at the end. Engine was a scrap and all that in 2 about 2 miles.

Hope you have better luck.

Mine was missing the mounting for the hose so it was rubbing on the fan without me knowing, then suddenly burst in to steam one day. Had a quick look to asses damage, filled with water from the nearby tyre garage, took off the expansion tank cap to prevent from pressure building up and pushing water out through the hole in hose and took extra 2l water bottle with me to fill up on the way. Drove about 15 miles home taking it easy, barely lost any water and did not need to fill up on the way and no other damage to car.