Mercedes S 55 AMG (5.5i) 360 hp — Stage 1 file (+18 hp)

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Chip tuning for Mercedes S 55 AMG (5.5i) 360 hp ECU

Mercedes S (1997 - W220) 55 AMG (5.5i) 360 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 360 to 378 hp (+18 hp, +5%) and torque from 530 to 560 Nm (+30 Nm). ECU — Bosch ME2.8. Flashing method: OBD or Bench depending on the unit's protection. The 1997 generation — old-era petrol ECUs (ME7/ME9/MED9/Simos) with easily readable memory.

Mercedes is one of the most protected brands in the chip tuning industry in terms of encryption. 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. Maybach uses Mercedes engines for the ultra-luxury segment, with the emphasis on quietness and smoothness. 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.

The AMG community is active in Germany, but the protection is the toughest in the industry, so Stage 1 on AMG usually requires Bench. 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. AMG Performance Studio is Mercedes's in-house tuning studio for bespoke projects. 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).

Frequently asked questions

What power gain do you get after chip tuning the Mercedes S 55 AMG (5.5i) 360 hp?

After Stage 1 the power of the Mercedes S 55 AMG (5.5i) 360 hp rises from 360 to 378 hp, a gain of 18 hp (+5%). Torque rises from 530 to 560 Nm (+30 Nm).

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

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 +18 hp with no hardware changes.

What is the Stage 1 potential of the Mercedes S 55 AMG (5.5i) 360 hp?

Stage 1 for the Mercedes S 55 AMG (5.5i) 360 hp unlocks the potential built in by the factory but artificially capped to meet mass-market targets. A base of 750-800 hp is achievable once hardware is added.

How much does Stage 2 add on the Mercedes S?

Stage 2 on the Mercedes S 55 AMG (5.5i) 360 hp means software + hardware (exhaust, intake, intercooler). The gain depends on the specific hardware combination.

Which ECU is fitted to the Mercedes S 55 AMG (5.5i) 360 hp?

The Mercedes S 55 AMG (5.5i) 360 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 55 AMG (5.5i) 360 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 55 AMG (5.5i) 360 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 55 AMG (5.5i) 360 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: 31.08.2026 · Source: manufacturer technical documentation · Measurements: CHIPOK dyno