Mercedes GLC 43 AMG (3.0T) 390 hp — Stage 1 file (+30 hp)

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Chip tuning for Mercedes GLC 43 AMG (3.0T) 390 hp ECU

Mercedes GLC (2019 - X253) 43 AMG (3.0T) 390 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 390 to 420 hp (+30 hp, +8%) and torque from 520 to 620 Nm (+100 Nm). This engine ships with different ECU variants: Bosch MED17.7.3.1, Bosch VGS3-NAG3. The flashing method is determined by the specific unit: OBD, Bench or Boot mode. In the CHIPOK database: 4 configurations · 2 ECU variants. A 2019 petrol engine — the latest era of encrypted firmware; OBD access is available on production units, Bench on sport models.

4MATIC all-wheel drive is Mercedes' signature system, fitted to most models. The Mercedes-Benz Group AG (Daimler AG until 2022) comprises Mercedes-Benz, AMG, Maybach, Smart and the EQ line. AMG is the performance division of Mercedes (since 1967), building engines on the 'one man, one engine' principle in Affalterbach. AMG engines are a well-known base with plenty of headroom for Stage 2. AMG Performance Studio is the factory tuning studio for bespoke work. Mercedes encryption is among the toughest in the industry, especially on modern models.

The AMG community is active in Germany, but the protection is the toughest in the industry, so Stage 1 on AMG usually requires Bench. The Mercedes community in Europe has a large pool of available Stage files for the standard models. Stage 1 on Mercedes often requires refreshing the adaptations after the flash. 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. AMG Performance Studio is Mercedes's in-house tuning studio for bespoke projects.

Frequently asked questions

How much horsepower does Stage 1 add for the Mercedes GLC 43 AMG (3.0T) 390 hp?

Stage 1 chip tuning on the Mercedes GLC 43 AMG (3.0T) 390 hp boosts engine output by 30 hp: from 390 to 420 hp. Torque rises from 520 to 620 Nm (+100 Nm).

What changes in the Mercedes GLC ECU after Stage 1?

Stage 1 on the Mercedes GLC 43 AMG (3.0T) 390 hp is a software ECU calibration with no hardware changes. The key maps (boost/ignition/lambda/torque) are adjusted while factory tolerances are preserved. The gain is +30 hp with no hardware changes.

What does Stage 1 give on the top-spec Mercedes GLC 43 AMG (3.0T) 390 hp?

On the top-spec Mercedes GLC 43 AMG (3.0T) 390 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.

How does Stage 2 differ from Stage 1 on the Mercedes GLC 43 AMG (3.0T) 390 hp?

Stage 2 for the Mercedes GLC 43 AMG (3.0T) 390 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.

How many ECU variants does the Mercedes GLC 43 AMG (3.0T) 390 hp have?

The Mercedes GLC 43 AMG (3.0T) 390 hp has 2 ECU variants: Bosch MED17.7.3.1, Bosch VGS3-NAG3. Before flashing you need to read the specific unit — calibration is done for the exact hardware/software.

Does Stage 1 void the warranty on the Mercedes GLC?

Stage 1 on the Mercedes GLC voids the factory warranty on the engine and transmission — this is standard for all manufacturers. CHIPOK provides its own warranty on the quality of the remap.

How quickly is chip tuning of the Mercedes GLC 43 AMG (3.0T) 390 hp done?

The full remap cycle for the Mercedes GLC — from reading to writing the final file — takes 30-90 minutes depending on the ECU access method. The file is prepared at CHIPOK in 5-30 minutes.

Can you return to stock after Stage 1 on the Mercedes GLC?

The original Mercedes GLC ECU is always saved before flashing. Rolling back to the factory firmware is done with the same programmer in 25-30 minutes.

How much does Stage 1 cost for the Mercedes GLC 43 AMG (3.0T) 390 hp?

The cost of Stage 1 for the Mercedes GLC 43 AMG (3.0T) 390 hp is calculated in the calculator on this page — you select the options (DPF off, EGR off, AdBlue off, DTC off, etc.) and the price is capped by the package Max Price. Payment is by credits (1 cr = 1 €), with no subscriptions.

Last updated: 31.08.2026 · Source: manufacturer technical documentation · Measurements: CHIPOK dyno