Mercedes-Benz has been spotted once again testing the upcoming, all-new 2012 Mercedes-Benz A-Class. The next-generation Mecedes-Benz prototype is said to be in its final stages of testing.

Despite the heavy camouflaging and elaborate black plastic covering, testing for the all-new A-Class is said to be almost complete.

From these shots we can clearly see the new A-Class will take on the medium-sized C-segment hatch more consistently, unlike the previous and existing models which present a taller, almost MPV-like cabin layout.

The taller, more spacious style will be reserved for the next Mercedes-Benz B-Class, allowing the new A-Class to directly rival the new BMW 1 Series, Audi A3 and to some extent the Volkswagen Golf.

To achieve the new look, Mercedes-Benz had to develop an all-new platform for the model, giving it a sporty style, similar to one seen on the Mercedes-Benz A-Class Concept unveiled at both the 2011 Auto Shanghai event and the 2011 New York Auto Show.

Power for the new model will come from a range of four-cylinder petrol and diesel engines. These include two 1.6-litre petrol units, one producing around 91kW and the other 116kW. Two turbo diesel variants are also said to make their way into the line-up, one with 83kW and another with 101kW.

A more powerful sports version is also on the cards, showcasing a 2.0-litre turbocharged four-cylinder engine producing around 155kW. This version could use a similar powertrain to the one seen on the A-Class Concept.

The 2012 Mercedes-Benz A-Class is expected to be unveiled in full by the end of the year, and is slated to go on sale in Europe, initially, during the start of 2012.

Mercedes-Benz Australia confirmed earlier this month the all-new Mercedes-Benz A-Class will go on sale in Australia around mid-2013.