Mercedes S 420 CDI (4.0) 320 hp — Stage 1 file (+40 hp)
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Stage 1 file for Mercedes S 420 CDI (4.0) 320 hp
Target +0 hp. Custom development for your engine.
Chip tuning for Mercedes S 420 CDI (4.0) 320 hp ECU
Mercedes S (2005 - W221) 420 CDI (4.0) 320 hp — premium diesel 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 320 to 360 hp (+40 hp, +12%) and torque from 730 to 820 Nm (+90 Nm). ECU — Bosch EDC16CP36. Flashing method: OBD or Bench depending on the unit's protection. The 2005 generation — first-generation CDI/TDI/HDi diesels with relatively simple ECU protection; OBD reading works directly.
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. Mercedes pioneered CDI (Common-rail Direct Injection) technology on passenger-car diesels, in series production since 1997. Mercedes diesels have long been popular with the German police and taxi services. Mercedes diesel engines are fitted to passenger cars and commercial vehicles.
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. In the Mercedes commercial segment, Stage 1 focuses on torque. 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 S 420 CDI (4.0) 320 hp?
The Stage 1 gain for the Mercedes S 420 CDI (4.0) 320 hp is 40 hp (+12%) over the stock 320 hp, for a total of 360 hp. Torque rises from 730 to 820 Nm (+90 Nm).
What is Stage 1 chip tuning for the Mercedes S?
Stage 1 on the Mercedes S 420 CDI (4.0) 320 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 +40 hp with no hardware changes.
What does Stage 1 give on the powerful Mercedes S 420 CDI (4.0) 320 hp?
The high-output Mercedes S 420 CDI (4.0) 320 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 S 420 CDI (4.0) 320 hp?
Stage 2 on the Mercedes S 420 CDI (4.0) 320 hp means software + hardware (exhaust, intake, intercooler). The gain depends on the specific hardware combination.
What control unit does the Mercedes S 420 CDI (4.0) 320 hp run?
The control unit of the Mercedes S 420 CDI (4.0) 320 hp is the Bosch EDC16CP36. Before flashing, the engineer identifies the exact revision and selects the write method.
Does Stage 1 void the warranty on the Mercedes S?
Stage 1 on the Mercedes S 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 S 420 CDI (4.0) 320 hp done?
The full remap cycle for the Mercedes S — 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 S?
The original Mercedes S 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 S 420 CDI (4.0) 320 hp?
The cost of Stage 1 for the Mercedes S 420 CDI (4.0) 320 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.