Mercedes-Benz Glb250 vs Mercedes-Benz GLC-Class

What's the difference?

We all know by now Mercedes-Benz loves to fill a niche, and if it can't find a niche to fill, it will create one. So, please welcome its latest niche-filler, the GLB.

Despite shaping up as a mid-sizer, the GLB is a small SUV… with a twist. Whereas other small SUVs have five seats, the GLB has seven, lending itself to unrivalled practicality.

So, does the GLB operate in the 'Goldilocks Zone', or is it an answer to a question no-one asked? We put its mid-range GLB 250 variant to test to find out.

Let’s make one thing clear from the very beginning - this new Mercedes-AMG GLC63 S E Performance is technically superior to the model it replaces. Whether it’s actually better or not, is the real question at the heart of the matter.

Why? Because, like the C63 sedan stablemate, AMG has opted to replace the previous model’s 4.0-litre twin-turbo V8 engine with a new 2.0-litre four-cylinder hybrid powertrain. It was a move brought about in part because of increasingly stricter emissions standards in Europe, but also ties-in with the German firm’s success in modern Formula One racing.

While the new hybrid system offers more power, more torque and better fuel economy, as the lukewarm response to the C63 has demonstrated, the hard reality for AMG is that its buyers associate it with V8 and even V12 engines. That emotional pull is hard to replace with logic, even if the new model offers technical superiority.

But how does the new powertrain suit the GLC63 - is it just technically better or is it holistically improved?