The world first saw the Mercedes-AMG One hypercar as the Project One concept at the 2017 Frankfurt Motor Show. The concept's reveal was a huge deal. Formula One champion Lewis Hamilton was on hand while the German carmaker confirmed all planned 275 examples were already sold out at a price tag of $2.72 million per car. Development has been ongoing since then and a number of hurdles have risen, such as technical issues regarding emissions certification for the 1.6-liter V6 plug-in hybrid powertrain. A 1,200 hp or so F1 hypercar for the road is bound to have problems but we never thought they'd take this long to resolve.

Last February, we reported the automaker was gearing up for a late 2021 delivery date to customers. The final stretch of the year is nearly here and still no deliveries. What gives?

According to The Supercar Blog, customers will now have to wait until the first business quarter of 2022. The exact reason for this latest delay was not provided and company sources have not confirmed the news. They also haven't denied it. What's for certain is that final testing remains underway, as recent spy photos prove.

That lightly camouflaged prototype was being put through its paces around the Nurburgring equipped with production parts. Compared to past test mules and the concept, this vehicle had the final production LED taillights and an updated front fascia with LED daytime running lights. We also caught a glimpse of the active rear wing in the lowered position.

The interior, also caught by our photographers on a separate spy mission, features an F1-style steering wheel, two large screens, and plenty of carbon fiber throughout the cabin. AMG hasn't released final performance specs at this time, but it's been strongly hinted 0-124 mph will take less than six seconds and top speed should hit 217 mph.

We were hoping for a big Mercedes-AMG One reveal this past week at the Munich Motor Show, but that didn't happen. The next major international motor show held in Europe (assuming there will be one) is Geneva in March. In any case, the world and buyers won't have to wait too much longer, though that's been said before.