My jaguar xj was towed by flatbed and now rear is extremely low, jacked it up to get tires away from wheel well. Any ideas how to correct this? Ive had no issues prior to this tow. Thanks

 

Have you started the engine yet ? During towing the suspension is in use and the ASM recognises a tow, and eventually, with suspension movement, the air in the reservoir will be used up because the compressor will not come on with the engine not running.