Mercedes C 250 CGI (1.8T) 204 hp — Stage 1 file (+36 hp)

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Chip tuning for Mercedes C 250 CGI (1.8T) 204 hp ECU

Mercedes C (2010 - W204) 250 CGI (1.8T) 204 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 204 to 240 hp (+36 hp, +18%) and torque from 310 to 380 Nm (+70 Nm). ECU — Siemens/Continental SIM271DE2.0. Flashing method: OBD or Bench depending on the unit's protection. The 2010 generation — mid-generation petrol ECUs (MEDC17/MEVD17/Simos PCR), OBD flash on production revisions.

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'). Smart is Mercedes's city sub-brand, historically running Mitsubishi and Renault engines. The Mercedes petrol range spans compacts, premium saloons, SUVs, roadsters and AMG flagships. Mercedes encryption is among the toughest in the industry, especially on modern models. Maybach uses Mercedes engines for the ultra-luxury segment, with the emphasis on quietness and smoothness.

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. On Mercedes up to the recent generation, Stage 1 OBD flash is available. The Mercedes premium segment is a high-output platform with Stage 2 potential. High-output Mercedes engines are premium-class with solid headroom for Stage 1. On modern high-output Mercedes, Bench reading is often required because of the encryption.

Frequently asked questions

How much horsepower does Stage 1 add for the Mercedes C 250 CGI (1.8T) 204 hp?

After Stage 1 the power of the Mercedes C 250 CGI (1.8T) 204 hp rises from 204 to 240 hp, a gain of 36 hp (+18%). Torque rises from 310 to 380 Nm (+70 Nm).

How does Stage 1 differ from stock on the Mercedes C?

Stage 1 on the Mercedes C 250 CGI (1.8T) 204 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 +36 hp with no hardware changes.

What does Stage 1 give on the powerful Mercedes C 250 CGI (1.8T) 204 hp?

The high-output Mercedes C 250 CGI (1.8T) 204 hp has a conservative factory calibration aimed at the mass market. Stage 1 unlocks the engine's real potential while turbo and injector life are preserved.

How does Stage 2 differ from Stage 1 on the Mercedes C 250 CGI (1.8T) 204 hp?

Stage 2 on the Mercedes C 250 CGI (1.8T) 204 hp means software + hardware (exhaust, intake, intercooler). The gain depends on the specific hardware combination.

What control unit does the Mercedes C 250 CGI (1.8T) 204 hp run?

The control unit of the Mercedes C 250 CGI (1.8T) 204 hp is the Siemens/Continental SIM271DE2.0. Before flashing, the engineer identifies the exact revision and selects the write method.

Does Stage 1 void the warranty on the Mercedes C?

Stage 1 on the Mercedes C 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 C 250 CGI (1.8T) 204 hp done?

The full remap cycle for the Mercedes C — 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 C?

The original Mercedes C 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 C 250 CGI (1.8T) 204 hp?

The cost of Stage 1 for the Mercedes C 250 CGI (1.8T) 204 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: 30.08.2026 · Source: manufacturer technical documentation · Measurements: CHIPOK dyno