S90 L6-2.9L VIN 96 B6304S (1998)
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plate washer and foam rubber seal at firewall penetration
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climate unit from firewall.
Inside car:
9. Remove heater and defroster ducts. (Do not remove duct through steering column mounting.)
10. Disconnect following leads from climate unit:
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positive terminal strip
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connector for ambient temperature sensor, blower motor, power stage and control module (if applicable).
11. Disconnect connector for:
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coolant temperature sensor (connector at right in illustration)
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solenoid valves
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servomotor.