RENNtech Smart Car ECU Upgrade (69HP/66LB-FT) mercedes-benz-cla-class--118---2020-present--cla-35--amg-esr2775909 050 RPM Mercedes M155 engine

050 RPM Mercedes M155 engine performance when measured

Rated by RENNtech (peak @wheel):              666 whp @ 5

806 LB-FT @ 4

Rated by Mercedes-Benz:      537 HP @ 5

Reduce risk of brake fluid boiling

RENNtech Smart Car ECU Upgrade (69HP/66LB-FT) mercedes-benz-cla-class--118---2020-present--cla-35--amg-esr2775909 050 RPM Mercedes M155 engineRENNtech Smart Car ECU Upgrade. Up to 69HP and 66LB FT. Gains: +5HP & +5LB FT Our proprietary SMART ECU upgrade offers rock solid performance from RENNtech, the foremost tuning authority on Bosch and Siemens engine control units. These same units are utilized in Mercedes Benz vehicles, which RENNtech has been tuning since electronic engine management started to show up in vehicles during the mid 1980's, though our proprietary tuning software and