Mercedes A25 AMG spotted testing in 4 door formThe A25 AMG is clearly on the way as seen here. The model testing comes very quickly on the heels of its production being announced and that the A-Class would be coming to the USA. As stated in the previous report, the car will get a 340 horsepower 2.0 liter direct injected turbo 4 cylinder. It will compete with the Volkswagen Golf R and Audi S3. With no 1 Series in the USA it would seem Mercedes will have an advantage over BMW in this segment.