Presented in 2013 for the first time, the GLA was introduced as a new compact SUV range to the A-class Mercedes line-up. Becoming considerably popular in China, USA, Germany and Great Britain, the manufacturer has made quite an impact as the GLA proves relatively small from the outside, yet is spacious in design. Combined with the versatility of the model on any terrain, it is understandable that Mercedes have sold over 2 million if these models. Four years after the first GLA was launched, what can you expect from the new GLA facelift? Is it worth it and has the GLA range undergone considerable changes?