The newer ones are held in place by the outer strap. It turns 90 degrees to either sit on a ledge on the base (installation position) or up agains the surround (installed).

Get a pair of heavy pliers and pull the outer sheetmetal part down, then turn to put the plastic "feet" up on the ledges. I don't remeber which way, right I think. You will have to pull very hard, and keep your fingers clear -- don't ask why I know they pinch HARD of the pliers slip off.

Otherwise, to remove the star, pull down on the base and turn left (or right, I'm dyslexic) to unlatch, pull out, insert new star, pull base down and turn left to latch it.

Nicer than the old slide lock.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!