RENNtech ECU Upgrade for CLK 350 C209 | 290 HP / 278 LB-FT | MY2006-2009RENNtech ECU Upgrade for 209 CLK 350 AMG, up to 290HP, 278LB FT. Gains: +22HP & 20LB FT RENNtech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980's! Our experience, countless hours of in house research, development and exhaustive testing ensure that our proprietary ECU upgrade offers incredible performance gains and rock solid daily driver reliability. RENNtech tuning
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RENNtech ECU Upgrade for CLK 350 C209 | 290 HP / 278 LB-FT | MY2006-2009