Hi This is  something i found out this last weekend having a lot of miles to cover from Wiltshire to Aberdeen for a wedding, my daughters actualy

. Nearly had a heart attack seeing the bonnet bounce up and down on the drivers side.. I had gently closed the bonnet after looking in the engine compartment.prior to driving a long way and topping up the washer bottle. I had to stop when travelling at 65-75 MPH and  seeing the bonnet vibrating in strong winds,  I have now found out that the drives bonnet lock was not fully grabbing the bonnet clamp. I was relieved to find that this XF has two bonnet lock mechanisms.

I only had this car three weeks so i am disappointed. I now have to use up my Diesel to take it to HA FOX in Southampton and book it in to have it adjusted under warranty. I can see a difference in the bonnet to wing edge on the drivers side.  Hope it gets fixed.. 

I have fixed the Bonnet problem because hte bonnet catch on the drivers side did not engage properly because the catch was so dry all i did was soak it in WD40 and its was fixed.when i gently dropped it down. Shame it was not looked at properly when it was sold to me three weeks ago. But what a wonderful car i now have.