5000CS Turbo L5-2226cc 2.22L SOHC Turbo (MC) (1987)
To make manual antenna tamper-proof when not in use:
cut off small rubber grommet (arrow) from upper mast section
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antenna mast can now be pushed fully into antenna base and can only be extended by using special key
To extend antenna:
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insert key into top of antenna tip and rotate key 1/4 turn (90~)
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pull key upwards to extend mast
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remove key from mast and fully extend antenna by hand