after driving my lr4 (2011) for a couple of weeks, mileage is now 48000 km, when started the engine this morning, read on thedash low coolant, checked the water very very low i added fresh water at a near by station and green coolant, stupid of me to mix the green with orange, now must flush it out by an experienced mechanic, as notice there is a leakage under the hood. any comments?