Jaguar XK8 Valet key not working correctly

Use the Owners ignition key instead of the Valet key.

Open the door and remove the fuse box cover at the bottem of the A post. You might have to remove more of the plastic trim and take a positive lead from a battery to the red stud and take the black earth to the body this will power the boot.

all back seats are either screwed down or hooked in. you need to use a little muscle and lift up your back seat to see which is which. there is no other way to gain entry to your trunk.Trust me Ive locked my keys in my trunk too. Now i have a hidden spare to my door and trunk. GOOD LUCK

Tin opener

go to the trunk of the car and put the key into the trucnk tumbler and open it, that will deativate the valet mode...

The valet button is to the right of the steering column and is quite a large button and has the words 'VALET' clearly written on it. I think it allows you to lock valuables in the glove box but allow a Valet or Service engineer to drive the car - they will not be able to get into the glove box. I sdon't have the XK8 owner's handbook, and so I am guessing about the function of the Valet button, but that is what a similar device does on my Merc.

Welcome to Fixya

The car might be stucked in Valet mode. Use the black key that you have to open the trunk, it overrides the Valet Mode. The key goes in a hole that is between the X and the K on the emblem on the rear of the car.

Thank you for using Fixya!

If you need further help, reach me via phone at https://www.6ya.com/expert/elixirjose_00375ea24bd8141b

sounds like you have 2 probs if you turn ign on whilst holding valet button pressed it should cancel it if not the key is poss faulty

There are Valet keys (often with a green knob) that will
only unlock the front doors and the ignition but not the
glove box nor boot/trunk.

When either the front door locks or the console button is
pressed, all the doors should lock. Likewise, when either
front door is unlocked, all the doors fuel filler lid and if
selected, the boot will also unlock.

Boot lock has three positions. Unlocked to the left,
automatic with the doors in the center, always locked to the
right. Simply remove the key in what ever position you desire.

The locks can get confused and not work correctly. Simply
sit in the car and manually lock all the doors. That will
usually get the locking module sane again.

Whilst the vehicle is running with the normal key being used hold down the valet button for a few seconds