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Plus shipping, applicable import duty and installation.
RENNtech M157 Biturbo ECU Upgrades are TÜV approved!
Our intermediate level ECU upgrade for the Mercedes M157 engine still offers huge gains in performance across the entire RPM range, but with a slightly reduced peak HP and torque from our standard tune. This is ideal for customers who want increased performance in their daily driver without worry of extra strain on driveline components or for areas and countries with extreme altitudes, temperatures or fuel quality concerns.
Our intermediate ECU tune increases performance from 530 HP and 590 lb/ft torque (non performance package) to 624 HP and 653 lb/ft at the crank! This is a slight reduction from our standard tune but still offers white knuckle performance at one of the most affordable price points in the tuning market.
SL 63 (R231) Stock Performance (Without Performance Package):
SL 63 (R231) Stock Performance (With Performance Package):
Modified Performance (Without Performance Package):
Modified Performance (With Performance Package):
Our online store allows you to choose the best performance parts for your car. Instead of having the items delivered to your home, we can deliver direct to your local service center. You can browse products on this website. Please feel free to place an order and one of our representatives will contact you to arrange delivery and installation if requested of your new performance parts.