Renntech is a major name in Mercedes-Benz tuning, and the company’s latest undertaking gives the A45 a significant power upgrade. The company has kits coming in the first quarter of 2020 that can push the power as high as 592 hp (442 kW).
Powering this little beast is a 2.0-liter 4-cylinder turbocharged M139 engine that develops 416 hp and 369 lb-ft of torque.
To get the full 592-hp output, the A45 requires a modified turbocharger, exhaust, and engine software. The same is true for Renntech’s upcoming 543 hp (405 kW) upgrade. If you don’t want to make the mechanical changes, then the firm also has a tune making 469 hp (349 kW) and 424 lb-ft (575 Nm) that only requires software changes.
An optional downpipe with sports catalytic converter will also be available in the spring. Renntech hasn’t said how these modifications will affect the performance, but the standard Mercedes-AMG A45 S is no slouch with a 0-62 mph sprint time of 3.9 seconds.
Renntech is also working on a new exhaust system based on the original catalytic converter that will make the hot hatchback sound even more aggressive. Complementing the standard exhaust system is an available remote-control exhaust valve module that allows the exhaust valve to be fully opened in all driving modes.