Mercedes S 500 (5.0i) 306 hp — Stage 1 file (+20 hp)

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Chip tuning for Mercedes S 500 (5.0i) 306 hp ECU

Mercedes S (1997 - W220) 500 (5.0i) 306 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 306 to 326 hp (+20 hp, +7%) and torque from 460 to 485 Nm (+25 Nm). ECU — Bosch ME2.8. Flashing method: OBD or Bench depending on the unit's protection. In the CHIPOK database: 2 configurations. A petrol engine built in 1997 — the era before widespread firmware encryption, OBD flash without complications.

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. On older-generation Mercedes petrol engines, Stage 1 is flashed over OBD without Bench. 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.

The AMG community is active in Germany, but the protection is the toughest in the industry, so Stage 1 on AMG usually requires Bench. Mercedes is one of the most protected brands in the chip tuning industry in terms of encryption. Stage 1 on Mercedes often requires refreshing the adaptations after the flash. On modern high-output Mercedes, Bench reading is often required because of the encryption. 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.

Frequently asked questions

How much horsepower does Stage 1 add for the Mercedes S 500 (5.0i) 306 hp?

Stage 1 chip tuning on the Mercedes S 500 (5.0i) 306 hp boosts engine output by 20 hp: from 306 to 326 hp. Torque rises from 460 to 485 Nm (+25 Nm).

What changes in the Mercedes S ECU after Stage 1?

Stage 1 chip tuning of the Mercedes S is a rework of the ECU maps: boost pressure, ignition advance, target lambda and the removal of factory torque limiters. The gain is +20 hp with no hardware changes.

Is Stage 1 safe on the high-output Mercedes S 500 (5.0i) 306 hp?

Stage 1 on the powerful Mercedes S 500 (5.0i) 306 hp “lifts” the factory limiters with no hardware changes. The gain is noticeable in the mid and upper range. There is headroom left for moving to Stage 2 (downpipe + intake + intercooler).

How much does Stage 2 add on the Mercedes S?

Stage 2 for the Mercedes S 500 (5.0i) 306 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.

Which ECU is fitted to the Mercedes S 500 (5.0i) 306 hp?

The Mercedes S 500 (5.0i) 306 hp ECU is the Bosch ME2.8. Production versions support OBD access; locked variants require Bench (BDM/JTAG).

What happens to the Mercedes S warranty after chip tuning?

The factory warranty of the Mercedes S does not remain valid after Stage 1 — the manufacturer withdraws its obligations once the ECU software is changed. CHIPOK provides its own warranty on its work and support.

How long does remapping the Mercedes S take?

On the Mercedes S 500 (5.0i) 306 hp: OBD flash 25-30 minutes, Bench (if required) about an hour. The file processing itself takes 5-30 minutes once the original bin is received.

Is the original file kept when chip tuning the Mercedes S?

Yes, the original ECU firmware of the Mercedes S 500 (5.0i) 306 hp is kept and can be flashed back at any time. Returning to stock via OBD takes 25-30 minutes.

What is the price of a Stage 1 remap for the Mercedes S?

Stage 1 for the Mercedes S 500 (5.0i) 306 hp is paid for with CHIPOK credits (1 cr = 1 €). The final amount is set in the calculator, taking the extra options (off functions) into account.

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