Mercedes Gl 420 CDI 306
Engine Tuning in Lancaster

Mercedes Gl 420 CDI 306: remap at a glance

• 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 engine tuning works on a diesel Mercedes GL-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 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 Lancaster

Remap Experts has a dedicated Lancaster site, so you deal with a local team backed by a national network. We regularly work with drivers in Millom, Ulverston, Seathwaite, Ravenglass and Grange-over-Sands and nearby areas of the North West.

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 Preston, Blackburn and Carlisle, those neighbouring Remap Experts sites can help too.