Spark plugs on the X20XEV under water

Hi, I’ve been owner of an Omega 2.0 16V for 3 weeks and I stayed there for the 3rd time yesterday. Cause -Zündaussetzung because the spark plugs are completely under wasse. Now my questions: where could the water come from? Could it be that somehow cooling water is squeezed out and collects in the wells of the spark plug holes? The first time the FOH assumed that the water could come from a engine wash-which was also carried out before the sale. the FOH put the candles and the ignition module only dry and expressed the assumption that the (rain) water could somehow run down the ignition cable?! Maybe someone already had similar problems? Would I be happy about tips! Still as an addendum: the water looks brown.Wherewith the cooling water in the balance tank is green.