Question: I have noticed that there is water in the V of my Mulsanne at the rear by the twin distributors.
Is there a common cooling system problem that causes this ?. 
The coolant level has dropped but not drastically & it seems to accumulate after the car has stood for a few days.

Answer: Normally it is brake fluid that fills up the section on the V. Can you confirm as this would be a leak from the brake pumps. Many thanks