Ok, found it mate, will test tomorrow and let u know

https://www.jaguarownersclub.com/for...test-mode-etm/

I meant, some faulty electronics in the cluster unit ( not specifically the dials/motors, as they're both playing up it's more likely in the driver circuitry - something common between the two maybe a voltage regulator, or a dodgy data line on an internal parallel bus intermittently dropping one of the bits due to bad transistor/dry joint for that line )

Understood, I will test engineering mode first, then I will see if there is anything in SDD to fix it with.
Thank you

Hi Phil, I followed this:

• Press and Hold the 'Trip' button on the light switch stalk
• Press and hold the 'Start' button (foot OFF Brake) whilst still holding in Trip Button
• Count 5 Seconds, release 'Trip' button whilst still holding start
• Foot on Brake, Engine will start, cluster will display 'Engineering Test Mode'
• Cycle through screens using the Trip button for Gauge tests, Battery, Fuel etc etc information
• Stop engine to clear test mode.

Engineering mode works, however when I start the car, depress brake pedal, it disappears I tried few times. Is above procedure correct?

I'm not sure, I'm sure I did it at one point, at a guess I'd say try "foot on brake" while still holding the trip button.

I tried foot on the pedal and other combinations, nothing worked, as soon as engine starts, it exits the engineering mode. Have to do more research... Everything is difficult with jags.