Mercedes Gl 420 CDI 306
ECU Tuning in Portsmouth

Mercedes Gl 420 CDI 306 power and torque after remapping

• Fuel: Diesel
• Standard power: 306 bhp, remapped: 345 bhp (+39 bhp, +13%)
• Standard torque: 700 Nm, remapped: 785 Nm (+85 Nm, +12%)
• Service: stage 1 ECU remap, fully dyno tested

How ECU tuning works on a diesel Mercedes GL-class

On a diesel the ECU decides how much fuel is injected and how hard the turbo works. A remap adjusts those calibrations within safe limits, so the gains show up mainly as extra torque low in the rev range and smoother, more responsive pull.

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

How the Mercedes Gl 420 CDI 306 compares

Of the 2 diesel GL-class engines in our data, this one comes 2nd for power gain, which is 1 bhp below the GL-class diesel average of 40 bhp.

Across our whole catalogue the average diesel remap adds 34 bhp and 73 Nm, so this engine's 39 bhp and 85 Nm sits at or above that benchmark.

Book engine remapping for your Mercedes GL-class in Portsmouth

Based around Portsmouth, our team serves local drivers as part of the nationwide Remap Experts network. We regularly work with drivers in Hayling Island, Winchester, Southsea, Newport and Gosport and nearby areas of the South East.

Each remap is dyno tested before it is signed off, and is protected by a 30 day money back guarantee and a lifetime software warranty. Ask for a quote online or by phone.

If you are closer to Southampton, Sussex and Basingstoke, those neighbouring Remap Experts sites can help too.