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Join Date: Sep 2009
Location: Minneapolis: DL DM charter 2.3MM
Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Posts: 102,617
You should be able to use the AF arrivals lounge if you arrive when it's open as SkyTeam ElitePlus arriving on an AF international (I assume) flight.
Have you checked the PP website for lounges in 2D?
IIRC there was an AF lounge land side on the mezzanine level at CDG, not too far from the Sheraton, but since this is a departures lounge, I don't think they will admit you before the Air Serbia flight unless it's an AF partner somehow.