S TYPE JAGUAR CANNOT APPLY PARK BRAKE MESSAGE

sounds like the battery is flat or gone bad get it tested/ charged. try using jump leads to confirm the problem if the battery is ok try doing a battery reset ie disconnect battery for a about 10 minutes reconnect and retry reset park brake by working it on/off a few times with ign. on and foot on brake

normal practice for all automatics
more noticeable it the idle speed is more than 750 rpms
if you don't want it to move , select neutral or park or gently apply the brake

the most likeley cause is the rear pads siezed in the caliper frames, when you apply the electronic park brake it detects incorrect travel and disables the park brake.check that first.the park brake motor is also suspect. you should really get the fault codes out of the parkbrake module to help diagnose yhis issue.

Bulletin from Jaguar :

Electronic Park Brake (EPB)
Re-Calibration Procedure
2003 MY-ON
S-TYPE
M44998-ON

Issue:
On some 2003 MY-on S-TYPE vehicles, a customer may report a concern of premature
parking brake pad wear or the brakes binding. This condition can result if the electronic
park brake (EPB) system is not re-calibrated after the removal of the rear brake callipers
to replace the brake pads.
Action:
Should a customer express concern regarding the above, refer to the calibration
procedure detailed in this bulletin.

1. Reset the EB module:
a. Switch off the ignition.
b. Disconnect the battery for 30 seconds. For additional information, refer to STYPE
Workshop Manual Section 414-01.
c. Reconnect the battery.
2. Start the engine.
3. Firmly apply and release the foot brake five times.
4. Confirm that the message NOT CALIBRATED" or APPLY FOOT AND PARK
BRAKE" is displayed on the instrument cluster message center. This indicates that
the parking brake is in calibration mode.
5. Lightly press the foot brake pedal.
6. Apply the parking brake by using the EB switch.
7. Release the parking brake.
8. Release the foot brake.
9. Confirm that the brake warning lamp is no longer illuminated on the instrument
pack and that the NOT CALIBRATED" message is no longer displayed in the
message center.
10. Apply and release the EPB five times to ensure no error is present.
_____________________________________________________________________________

NB: It is also possible the actuator is bad though.

its the senser switches =loose,not contacting thetrunk lid the wire to them loose adrift,fuse gone

check your brake light fuse

Try a reset of the park brake.
Make sure you have your radio code.!!
Disconnect the battery - leave for 10 Min's.
Reconnect.
Turn ignition on. If fault has not reset - try the following
Apply foot brake (not too hard)
Apply park-brake switch following instructions on the message center.

Use this method for any park brake fault as most of the time it fixes the minor problems caused by glitches and low battery voltage.
hope this helps good luck

A common fault on these cars, Often caused by low battery voltage. To reset -
Disconnect battery (make sure you have your radio code!) leave for 10 mins. then reconnect and apply foot brake and then park brake as per instructions on message center and the brake will recalibrate itself. Use this method first on any park brake fault - as 95% of the time it fixes them.
Hope this helps - good luck.

Park brake fault - Normally caused by low battery voltage. Try a reset.
Make sure you have your radio code !
Disconnect negative on battery - leave for 15 minutes then reconnect.
Apply foot brake then apply handbrake switch.
If this does not work you may have a park brake module/pump issue - that means main dealer fault reading visit
Hope this helps
- good luck.

Unfortunatly this is normal, nothing can be done about it. Get pads checked every 15,000 miles to save discs.