RENNtech Smart Car ECU Upgrade (69HP/66LB-FT) mercedes-benz-e-class-sedan--212---2010-2013--e-350-esr7514707 CLK (C208) 430 [2 Filters

CLK (C208) 430 [2 Filters Required] (HP: 279 | Year: 99 > 03)

we recommend remapping the ECU in order to prevent potential »check engine light« warning signals

W213 - E63 AMG 4MATIC+ Sedan (2 Filters required) (Year: 18 >)

Our intermediate level ECU+ upgrade for the Mercedes M157 Biturbo 4-MATIC engine offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability

The R1 performance package increases performance to 611 hp and 592 lb/ft without sacrificing daily driver comfort or reliability

RENNtech Smart Car ECU Upgrade (69HP/66LB-FT) mercedes-benz-e-class-sedan--212---2010-2013--e-350-esr7514707 CLK (C208) 430 [2 FiltersRENNtech 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