The Mercedes-Benz SL has been around for more than half a century, and has evolved into a couple of generations as the years went by. The SL is considered to be the longest surviving range among the different existing classes of the three-pointed star marque, predating the SLC and even the iconic G-Class.

Recently, it was revealed by a set of spy photographs published in Autoevolution that the R231 SL platform is undergoing a facelift. As seen in the images, it is sporting the headlights of the S-Class coupe. However, the source noted that the current addition is just a test mule.

The company is still in the early stages of developing a complete styling upgrade for the Mercedes-Benz SL. Therefore, what you are looking at is subject to further modifications and there are still more features to be added later to achieve a full facelift. According to the report, among the changes expected in the front of the car will be in the hood, radiator grille, bumper and apron. Minor alterations will be given to the rear of the car too, which will be found in the bumper and exhaust tips.

The article estimated that the full-blown changes might be witnessed as early as the winter testing season. As for the launching of the finished product, it is projected to be unveiled sometime in 2016 as a 2017 model.

2017 Mercedes-Benz SL Spy Shots

Check out the spy photos of the upcoming Mercedes-Benz SL below, which were provided by Autoevolution: