RENNtech ECU Hand Held Tuner (HHT) for CLK 63 AMG BS (C209- 534 HP / 485 LB-FT) mercedes-benz-sl-class--231---2012-2016--sl63-amg-esr3199425 Our intermediate level ECU upgrade

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

Dyno measured by RENNtech (peak):               691 HP @ 6

Buyer Beware: There have been reported failures the stock Turbo’s in the Mercedes-AMG 53 series M256 -engine

They have also been maximised in internal volume to reduce restrictions and in doing so we have also redesigned the OEM central cover as it fouls on the significantly larger system

RENNtech V3 DLM Module Specifications:

RENNtech ECU Hand Held Tuner (HHT) for CLK 63 AMG BS (C209- 534 HP / 485 LB-FT) mercedes-benz-sl-class--231---2012-2016--sl63-amg-esr3199425 Our intermediate level ECU upgradeRENNtech ECU HHT (HandHeldTuner) for the 209 CLK 63 AMG Black Series. Up to 534 HP and 485 LB FT LB FT. Gains: +34 HP & +20 LB FT. RENNtech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal! Our proprietary tuning module stores both the RENNtech tuned file and your vehicles stock file. The module plugs directly into the OBD2 port and delivers the file you choose