The scene where Hubert straps his pistol weirdly to his crotch is a reference to the poster of this movie (per admission of the director).
Scene where informant is stabbed before telling OSS 117 his secret mirrors scene at the UN where Townsend is stabbed while speaking to Thornhill
Hubert's hotel room in Cairo is reminiscent of Bond's suite in Dr. No.
The entire WWII flashback at the beginning is an homage to this movie.
DVD seen in the video rental store
The scene of Jack and Hubert rolling in each other's arms on the beach parodies the famous beach scene from this film
Sean Connery's Bond is subject to much parody. Also, The Istanbul scenes in "From Russia with Love" are mostly parodied.
Benoît Poelvoorde is digitally added in a shot behind Jean Dujardin and Bérénice Béjo.