Car went back on the road a week ago.

I drove 120 miles to work - no sign of a leak.
Next morning - still no sign of a leak.
One morning later about a cup of coolant on the ground.
Next day a couple drops.
Today, no sign of a leak, tomorrow I will drive the 120 miles back home.

I did however somehow damage the coolant level sensor. It is always indicating a low level.

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2006 X5 Sport 4.4i