Mercedes S-class S 420 CDI 320(+05)
ECU Remapping

Mercedes S-class S 420 CDI 320(+05) power and torque after remapping

• Fuel: Diesel
• Standard power: 320 bhp, remapped: 370 bhp (+50 bhp, +16%)
• Standard torque: 730 Nm, remapped: 835 Nm (+105 Nm, +14%)
• Service: stage 1 ECU remap, fully dyno tested

How ECU remapping works on a diesel Mercedes S-class

Modern diesels are held back by conservative factory calibrations. A remap updates the fuel and boost maps stored in the ECU, which is why drivers notice stronger acceleration from low revs and less need to change down on hills or when loaded.

For reference, CDI is the Mercedes-Benz name for its common-rail diesel engines.

Mercedes S-class S 420 CDI 320(+05) against other S-class engines

Of the 7 diesel S-class engines in our data, this one comes 1st for power gain, which is 13 bhp above the S-class diesel average of 37 bhp.

Across our whole catalogue the average diesel remap adds 34 bhp and 73 Nm, so this engine's 50 bhp and 105 Nm sits at or above that benchmark.

Remapping your Mercedes S-class across the UK

Our network covers the whole of the UK through local Remap Experts sites. Find your area to get a quote from a specialist near you.

Every remap is fully dyno tested and comes with a 30 day money back guarantee and a lifetime software warranty. Call 0800 779 7864 for a quote.