has mclaren had enough of ilmor(mercedes)

[clk-lm]

three years in a row ilmor has not produced a competitive engine for mclaren. i know that mercedes owns a chunk of mclaren and is plenty happy feeding ilmor with a healthy budget. but with BMW raising the bar, is it time for mercedes to bring there engine production under the roof in germany, or has mclaren had it with the mercedes name. i think that we can say that newey and co. have done their homework in the chassis and aero department and the car is more than capable, but will ron bring out the axe in the engine dept. any guess?????