RENNtech ECU Upgrade for C 320 (W204- 253 HP / 464 LB-FT) mercedes-benz-clk-class--209---2004-2010--clk-550-esr6180502 countless hours of in-house R&D

countless hours of in-house R&D

Mercedes recommends replacing the discs with every pad change because of the uneven surface

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RENNtech Performance Front Rotors | E63 (W/S 213) | SLS AMG (C197) | SL55/63 (R230) | GLC 63 (X/C253) | C63 Black Series (C 204)

RENNtech ECU Upgrade for C 320 (W204- 253 HP / 464 LB-FT) mercedes-benz-clk-class--209---2004-2010--clk-550-esr6180502 countless hours of in-house R&DRENNtech ECU Upgrade for 203 C 320 CDI. up to 253HP, 464LB FT. Gains: +23HP & 75LB 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 software