Happened on mine after washing the car. Dealer advised nothing to worry about as it will clear within a few days which it did. Doesn't happen when I wash my other car though so does make me wonder how the water gets in. I only use a hose too which is set to sprinkle not blast so definitely would not ever use a pressure washer!
Looks as though my dealer was trying to fob me off. Very disappointing when it appears to be a known issue. I will be pushing for mine to be replaced under warranty as they should not be letting water in. Service due in a couple of months time so I will request that they order replacements.
By way of an update, I had my car in for its second service yesterday. The dealer showed me a Jaguar bulletin which advised that condensation inside headlights was perfectly normal and went on to say that replacing the headlights would not cure the issue. So, it seems we are expected to put up with it.
The dealer also informed me that spark plugs are no longer changed every two years on a V6S as its no longer necessary. I presume, since I purchased a five year service plan that included two plug changes in the cost, Jaguar will be sending me a refund for the two sets of plugs that I have already paid for? UPDATE - No they won't do that as service plan costs the same without plug changes so no refund due, according to Jaguar. Spark plugs will be changed in year 6 or 75k miles so not covered by service plan!
When I got home and checked the oil level using the dashboard menu I found that the oil had been overfilled. The owners handbook advises not to use the engine as permanent damage may be caused so now I have to wait until after the bank holiday for the dealership service department to re-open. UPDATE - Car returned to dealership and level checked again and found to be spot on. Very strange but pleased it wasn't overfilled despite the electronic dipstick indicating that it had been.
Not the best experience to be honest. My other vehicle has zero headlight condensation issues and I get far better service from the dealership - it's a Ford!!