GM’s Opel brand will pull the wraps off a new model at the 17th Moscow International Motor Show in Russia that runs from August 27 through September 7.

But it won’t tell us what it is, not even whether it’s a regular production or a concept car.

The minds at Opel, however, are in a playful mood, as they released this picture of the vehicle swaddled in a silky yellow sheet asking viewers to guess what the model is.

If you have any idea, be sure to tell us in the comments box after the break.

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