With only a few days to go until the world debut of the new Mercedes GLA, the German automaker has released yet another teaser of the affordable SUV before its upcoming online reveal. After showing off the next-generation GLA's silhouette and luxurious interior, we get a look at the highly adjustable rear seats in a brief video posted on Facebook demonstrating the SUV's practicality and versatility.

Like the Mercedes GLB, the new GLA will adopt a 40:20:40 rear seat layout, which will be much more practical than the old model's 60:40 layout. The rear seats will be more adjustable, too, thanks to their sliding and reclining options.

According to Mercedes, the new GLA will offer "much more generous" rear legroom, which is an impressive feat considering the SUV is 0.59 inches shorter than its predecessor. It will also be 3.9 inches taller, allowing for more headroom and a higher seating position. This also makes the new GLA look more like a crossover compared to the current model, which looks like a hatchback on stilts.

Other interior upgrades will include a new MBUX touchscreen infotainment system and 64-color ambient lighting, while standard equipment will include automatic emergency braking, lane-keeping assistance, speed limit assistance, driver attention monitoring, and keyless ignition.

Under the hood, the new GLA will most likely utilize the same 2.0-liter turbocharged four-cylinder engine found in the A-Class, CLA, and GLB producing either 220 hp or 188 hp, paired with a seven-speed automatic transmission. Hardcore AMG variants and a new plug-in hybrid model will also launch later in the new GLA's model life cycle.

We'll have to wait until the covers come off on December 11, but in the meantime Mercedes recently shared some photos of a camouflaged GLA undergoing off-road testing, showing off its short front and rear overhangs and protective cladding.