Mercedes GL 500 (5.5i) 388 hp — Stage 1 file (+20 hp)

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Chip tuning for Mercedes GL 500 (5.5i) 388 hp ECU

Mercedes GL (2006 - X164) 500 (5.5i) 388 hp — premium petrol engine of the passenger segment of the Mercedes-Benz Group AG (Mercedes-Benz, AMG, Maybach, Smart, EQ) group (Германия, 1926). Stage 1 chip tuning raises power from 388 to 408 hp (+20 hp, +5%) and torque from 530 to 570 Nm (+40 Nm). ECU — Bosch ME9.7. Flashing method: OBD or Bench depending on the unit's protection. In the CHIPOK database: 2 configurations. A petrol engine built in 2006 — the era before widespread firmware encryption, OBD flash without complications.

Maybach is Mercedes's ultra-luxury sub-brand. Mercedes-Benz is the world's oldest carmaker, founded in 1926 by the merger of Daimler-Motoren-Gesellschaft and Benz & Cie. The Mercedes slogan is 'Das Beste oder nichts' ('The best or nothing'). AMG Performance Studio is the factory tuning studio for bespoke work. Mercedes encryption is among the toughest in the industry, especially on modern models. Top AMG engines offer significant potential with a downpipe + intake.

Stage 1 on Mercedes often requires refreshing the adaptations after the flash. Mercedes is one of the most protected brands in the chip tuning industry in terms of encryption. The Mercedes community in Europe has a large pool of available Stage files for the standard models. Bench reading is a mandatory procedure for modern AMG models. Top AMG engines sit at the Mercedes power ceiling, and the gain is significant. AMG engines are a well-known base once hardware is added (downpipe + intake + intercooler). Brabus is a premium alternative to AMG for the top models.

Frequently asked questions

How many horsepower does the Mercedes GL 500 (5.5i) 388 hp reach after a remap?

Stage 1 chip tuning on the Mercedes GL 500 (5.5i) 388 hp boosts engine output by 20 hp: from 388 to 408 hp. Torque rises from 530 to 570 Nm (+40 Nm).

What changes in the Mercedes GL ECU after Stage 1?

Stage 1 is a software optimization of the factory ECU firmware of the Mercedes GL with no hardware changes. The injection, boost, ignition-timing and torque maps are reprogrammed. The gain is +20 hp with no hardware changes.

Does Stage 1 make sense on the Mercedes GL 500 (5.5i) 388 hp with this much power?

On the top-spec Mercedes GL 500 (5.5i) 388 hp engine, Stage 1 is the starting point before Stage 2 with a downpipe, intake and a larger intercooler. The mass-market factory calibration leaves substantial headroom for an aggressive software tune.

What is Stage 2 for the Mercedes GL 500 (5.5i) 388 hp?

Stage 2 for the Mercedes GL 500 (5.5i) 388 hp is Stage 1 plus hardware changes: a downpipe, a larger intake and a performance intercooler. The gain is considerably higher, but it requires professional component selection.

What ECU platform does the Mercedes GL 500 (5.5i) 388 hp use?

The Mercedes GL 500 (5.5i) 388 hp is fitted with the Bosch ME9.7 ECU. The read method depends on the unit's protection: OBD, Bench via BDM, or Boot mode.

Does the factory warranty of the Mercedes GL remain valid after Stage 1?

After remapping the Mercedes GL, the official factory warranty on the engine and gearbox is lost (this applies to any manufacturer when the ECU is modified). CHIPOK guarantees the quality of the calibration and free revisions.

How long is the wait for a Stage 1 remap for the Mercedes GL?

Reading and writing via OBD takes 25-30 minutes on the Mercedes GL. Bench reading (BDM/JTAG) takes about 60 minutes plus refitting. Remote file processing at CHIPOK takes 5-30 minutes.

How do you roll back to the factory firmware of the Mercedes GL?

Before Stage 1 the original of the Mercedes GL 500 (5.5i) 388 hp is read out and saved — returning to the factory state is possible at any time.

How much does chip tuning the Mercedes GL 500 (5.5i) 388 hp cost?

The remap price for the Mercedes GL 500 (5.5i) 388 hp is dynamic and is calculated in the CHIPOK calculator based on the selected options. A credit-based payment model, with no subscription fees.

Last updated: 01.09.2026 · Source: manufacturer technical documentation · Measurements: CHIPOK dyno