Does anyone know how to hot wire a sunroof switch at a pick and pull?
Cars there don't have a battery, so I will have to bring one.
Cars there don't have keys, so I need to power up the swith directly from an external source (battery).

Does anyone have a detailed explaination on hot wiring the sunroof?

Pop the switch out of the dash and add 12vdc to it. Ground the negative to the car.

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1985 300D 198K sold
1982 300D 202K
1989 300E 125K
1992 940T

"If you dont have time to do it safely, you dont have time to do it"

"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."

There's also backup device in the left side of the trunk hidden behind the trunk lining on many models. You use a wrench to turn it and get the sunroof open that way. This way you don't need to lug a battery in with you.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.

Roger what Skippy said. You will need a small (about 1/4") open end wrench if the tool is missing. Also you may have to pull the trunk liner out on that side to access.

Worst case is to dismount the motor and pull the cable with pliers to open the roof enough to access the mechanism under the headliner.