May 17 (GMM) Norbert Haug is keeping silent amid reports Mercedes is set to introduce an exciting upgrade package in Barcelona this weekend.

The team has confirmed that a significant package of new parts will be debuted in Spain, with rumours suggesting a Red Bull-style flexible wing and a Renault-style front exhaust layout may be among the changes.

"We have quite a few things in the pipeline, but Ross (Brawn) will hit me if I tell," Mercedes' motor sport vice-president Haug joked in an interview with ibnlive.com.

"So, (there's) no chance that I can be specific," he added.

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