LairdScooby

First of all the car won't know it's only an 80Ah battery so that isn't the cause of the Start-Stop not working. However, if you do get the start-stop working, a lower power battery will be more likely to go flat in traffic. It's obviously not fully charged as it should be 12.6-12.7V for fully charged. I would insist a 95Ah battery is fitted as per spec (assuming you have found a reliable source to confirm that) and then you probably need to reset the start-stop as well as other systems. http://www.jagrepair.com/JaguarXF.htm Hopefully you can find the relevant information there to do it.

There's a diagram of the 1999 "Parking Assist", something i've found is if road dirt is present on the sensors they have a tendency to give false alarms so they need to be kept clean. Never quite been sure about front ones, after all you are hopefully looking as you drive forwards! 😛

Precision

It sounds like one or more systems need resetting after the power interruption, have a look here and you will hopefully find the answer : http://www.jagrepair.com/JaguarXF.htm?utm_source=JaguarOwnersClub&utm_medium=ForumLinks&utm_campaign=referrals

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Starboard

Tawny

http://www.jagrepair.com/JaguarXF.htm If you have a look there Nick, there are several procedures, reprogramming the emergency brake (handbrake), auto-windows and so on and another section on the battery which should give the information you need. I'm guessing the original battery was still in the car and you used jump leads from your L200? If so, i seriously doubt any car would start if the original battery was completely flat, even without the various procedures to reprogram everything. Also make sure whatever battery you fit in the XF is fully charged as a emi-charged battery can void the alternator warranty. I'd wait until tuesday, fit the new battery then go through all the procedures. After that, hopefully you'll have a fully runnign car again, you may also have to go through a driving procedure to get the ECU to re-learn the fuel trims etc.

Is the engine actually cranking when it should? Also is the "spare" battery big enough to do the job? It's also possible the immobiliser is in a lockdown state, especially if the original battery went flat and it hasn't been cycled through the lock/arm and unlock/disarm procedure to reset the immobiliser and alarm.

Generally CD multichangers derive their power from the head unit on that age vehicle so it could be unplugged at the head unit, even just partially unplugged will do it. If you've only recently bought it, some dealers remove head units to avoid theft and only replace them for viewing/sale on the day of. Highly possible they didn't know to refit the CD changer cable Welcome aboard too!

Silly question but is the solenoid plugged into the electrical system? Also check a patch lead hasn't been used by the factory (to extend a shorter, common loom so it reaches the position of the VVT solenoid on your engine) and wasn't disconnected by the people that did the timing chain work. Also try resetting the codes, it may have been the garage forgot to reconnect when they did the timing chains and because the fault code didn't show immediately, didn't clear it - a historical fault can sometimes show later and cause problems.

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The original fit on your X Type would have been Pirelli P6000J - the J denoting Jaguar. Sadly these are no longer available, i've used P6000s (the generic P6000 rather than the "J" type) on other cars and they've been really good tyres. I have a pair of (10 year old) P6000s on the front of my S Type and because of their age, their grip is reduced. On the rear are (5 year old) P7 Cinturatos, not impressed with those either! I'm looking for a set of tyres to replace all 4 on mine but with yours being AWD, you'll have to renew all 4 at the same time with the same type all round to get optimum results. There used to be a brand known as Corsa, these were old-pattern Pirelli tyres, made by Pirelli, i put a set of these on an old Volvo 740 about 18 years ago and transformed the car. I know with Jaguars in general, having the same type of tyre all round is more important than other cars but with any AWD/4WD it's also important to have them all wearing at the same rate to avoid transmission wind-up. I'm currently looking at a set of : https://www.ebay.co.uk/itm/144518219295 for mine, surprisingly good reviews for a "budget" tyre and not being impressed with the Pirellis (first time ever Pirelli have failed to impress me) they're probably a reasonable bet. Will be interested to know what you finally decide on. 😉 😄