Mercedes-Benz GL 420 CDI 306hp Remap

Name: Mercedes-Benz GL 420 CDI 306hp ECU Remap
Brand: Mercedes-Benz

Expected gains of +44 BHP and +110 Nm torque

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BHP+44 hp (14%)

Standard

306 hp

Tuned

350 hp

Torque+110 Nm (16%)

Standard

700 Nm

Tuned

810 Nm

Suitability

Good (6.5/10)

Gains Profile

Balanced

Headroom

Medium

Mercedes-Benz GL 420 CDI 306hp ECU Remapping

Considering an ECU remap for your Mercedes-Benz GL 420 CDI 306hp? A Stage 1 remap can take this X164 - 2006 - 2012 diesel engine from 306 BHP to 350 BHP and from 700 Nm to 810 Nm of torque (turbocharged). This engine scores 6.5/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Mercedes-Benz GL can achieve.

How this engine compares

8thof 14 Mercedes-Benz GL engines by power gain
70%of the 9,842 engines we hold gain data for see a smaller power increase
85%of engines with torque data see a smaller torque increase

Comparisons are calculated from our own recorded Stage 1 figures.

Assessment

The Mercedes-Benz GL 420 CDI 306hp is a 4.0L turbocharged diesel engine producing 306 BHP and 700 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 350 BHP and 810 Nm — a gain of around 44 BHP (14%) and 110 Nm (16%).

This engine has moderate remap suitability, with a balanced spread of gains across both power and torque — providing a noticeable improvement across the rev range. The tuning headroom is classified as moderate, based on the percentage gain available from the factory output.

All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method. We recommend discussing your specific vehicle with a qualified remap professional.

Other GL X164 - 2006 - 2012 Engines

Engine	BHP	Gain	Torque	Gain	Score
320 CDI 211hp	211 → 260	+49	510 → 600	+90	Good (7.5/10)
350 CDI 211hp	211 → 275	+64	510 → 600	+90	Good (7.5/10)
320 CDI 224hp	224 → 260	+36	510 → 600	+90	Good (6.5/10)
350 CDI 224hp	224 → 275	+51	510 → 600	+90	Good (7.5/10)
350 CDI 265hp	265 → 295	+30	620 → 700	+80	Good (6/10)
450 CDI 306hp	306 → 350	+44	700 → 810	+110	Good (6.5/10)
450 - 340hp	340 → 355	+15	460 → 485	+25	Limited (3/10)
500 - 388hp	388 → 405	+17	530 → 570	+40	Limited (3.5/10)

Technical Specifications

Fuel Type: Diesel
Aspiration: Turbocharged
Displacement: 4L
Capacity: 3996 CC
Type: Car
Engine Family: Mercedes-benz 4.0L CDI Turbo Diesel

ECU & Transmission

Likely ECU Low confidence: Bosch EDC16 / Siemens SID (varies)
Gearbox Low confidence: Transmission varies by trim and market; check manual/automatic type and torque rating. At this torque level, transmission and driveline servicing history becomes especially important.

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Confirm Your Vehicle

MakeMercedes-Benz

ModelGL

GenerationX164 - 2006 - 2012

Engine420 CDI 306hp

All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method.

We recommend discussing your specific vehicle with a qualified remap professional before proceeding.