The "S" types were produced in Jaguars pepper pot era and suffer from poor quality elec connectors among other things.
They drive like a plank and quite frankly are one of the worst cars Jaguar ever made. They even forgot to remove the brace each side of the rear window that was needed when the plan was a mid engine, but they then decided against that but forgot to alter the drawings innit.. do'hhh.
Almost any of the saloons would be a better buy....
PS. watch out for rust around the headlights of old Jaguars. Paper was stuffed in and filler piled on to hide it on many of them.....
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