Can I use a trickle charger on a 2007 jag XK8 during storage for 45 days? R Smith

fixya doesnt sell products

yes.

Check the relays first. Make sure battery is fully charged. Low voltage can cause problems. Try owners forum for Jag.

Is the key a new one?
Please see link below for key stuck in cyliner lock of kaguar, not an ck8 but a jag....should be relevant to your problem

http://www.jaguarforums.com/forum/x-type-x400-14/key-stuck-ignition-please-help-23364/

These diagrams are contained in the owners manual, you can access that at the Jaguar owners site free of charge in pdf file format. Click this LINK

if you are asking this because your vehicle is driven seldomly or in storage you should get a low amperage trickle charger. there are many different types but you need one with an automatic cutoff when the battery is fully charged and no more than 1 amp is necessary

Check your Throttle

a good battery will hold a charge through the winter if disconected from the vehicle adn left fully charged.
you may want to look into a battery monitoring charger, it is a trickle charger that is designed for long term use, it monitors battery volts and turns on when needed.

also put carpet squares or cardboard under the tires if you are parking on concreet. this will help prevent dry rot and flat spots

this is the most expencive and grandest in the rolls royce range coming in at £250000 thats a lot of money, so what do you get? to be honest i think this car is a rip off, ok ok you cant deny the quallity and build of this car, but isnt it the same for all rollers? sure, you get a turbocharged v8 producing 544lb ft of torque but you could get that with a ford mustang. i dont think that the interior of this car is that much better than that of a top of the range jag. in fact at nearly £?200000 less the jag xk8 4.0 soft top is a much better buy.