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

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

What a remap does for a diesel Mercedes S-class

The gains from remapping a diesel come from the engine management software rather than new parts: injection, boost and torque limits are re-mapped, which is why torque improves most and why the car often feels easier to drive at lower revs.

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

How the Mercedes S-class S 420 CDI 320(+05) compares

Among the 7 diesel S-class engines we have figures for, the S 420 CDI 320(+05) ranks 1st for power gain, 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 in Cardiff

Based around Cardiff, our team serves local drivers as part of the nationwide Remap Experts network. We regularly work with drivers in Pentyrch, Rumney, Riverside, Rhiwbina and Llandaff and nearby areas of Wales.

All our remaps are fully dyno tested, backed by a 30 day money back guarantee and covered by a lifetime software warranty. Request a quote online or call 0800 779 7864.

If you are closer to Gwent, Bristol and Midwales, those neighbouring Remap Experts sites can help too.