Key takeaways The A45 AMG is already very powerful, so a remap adds performance but also stress. Gains depend on the exact engine, fuel quality and supporting hardware. Choose a specialist with real experience of AMG engines and ask about their guarantee. Think about warranty, insurance and reliability before you tune. The Mercedes A45 AMG is already one of the most powerful compact hot hatches ever built, and its 2.0 litre turbo engine is a favourite among tuners. A remap can make it feel even more aggressive, but this engine runs close to its limits from the factory, so the details matter. The cars in short First generation (2013 to 2018): a 2.0 litre turbo four cylinder with all wheel drive (4MATIC) and a dual clutch gearbox. Output was around 360 hp at launch and around 380 hp after the 2015 update. Second generation (A45 and A45 S): a newer 2.0 litre turbo engine, with roughly 390 hp in the A45 and around 420 hp in the A45 S. Figures can vary by market and model year,...
Chiptuning and ECU remap guides: how it works, what you can gain, the risks and how to choose a good tuner.