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Title: Slip, sliding away...
Review: Do not waste your money on this item - even with the post mount.Mine ended up sliding left and right, back and forth on a clean flat dash.Plus the ball post head I guess was smaller than the original, since the c550 kept going into the down position. Garmin has been unresponsive to my support/customer service emails. So far the window suction cup works the best!
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