C70 L5-2.4L Turbo VIN 63 B5244T7 (2003)
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Make a note of radio code if anti-theft coded radio is installed.
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Remove battery negative lead.
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Remove seat from car according to Replacing seat assembly See: Service and Repair/Removal and Replacement/Replacing Seat Assembly.
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Remove lumbar adjustment knob. Unscrew in a counter-clockwise direction until stop. Then continue unscrewing counter-clockwise while pulling
firmly outwards.