The Mercedes S 420 CDI 320hp (W221 - 2005 - 2013) produces 320bhp and 730Nm in standard form. A Stage 1 ECU remap can raise output to 360bhp and 820Nm, a gain of 40bhp and 90Nm, with no hardware modifications required.
Interested in a Stage 1 remap for your Mercedes S? Get in touch and we will discuss the best options for your vehicle.
JSM Diagnostics comes to you. Mobile ECU remapping across Medway and the surrounding areas.
Call us: 07711 934 905
Mon – Fri: 8:30am – 5:30pm