A patent filed in Germany seems to show intent for AMG to take on the Aston Martin Rapide and Porsche Panamera.

There are few things left in the auto industry whose sacred nature is respected. Porsche's top-selling model is an SUV, the manual is dying, and now, it appears the SLS AMG is growing another set of doors.

The suggestion of a four-door Mercedes-Benz SLS AMG model stems from a series of photos filed at a German patent office, later picked up by Autoblog and Motor Authority. The images clearly show a stretched version of the SLS with an extra set of suicide doors to go along with the iconic gullwing doors.

Of course, the documents are unconfirmed from Mercedes-Benz, as the automaker gave a big "No comment" to Autoblog when asked about them. It is possible the filing was a "just in case" move to keep the door open to future possibilities given the way many exotic and high-end luxury sports cars have been moving towards four-door variants lately.

It should also be noted that the documentation accompanying the illustrations apparently went into a fair amount of detail (in German) about weight savings due to the special design of how the doors would be attached and function. With a top-dollar performance car of this nature, a unique solution to the weight problem associated with adding two more doors could be what it takes to make a push towards production.

For now, we file this under "maybe," as we will have to wait and see if any further information leaks from the German automaker before claiming that a four-door SLS AMG is heading to a dealer lot near you.