Original file
Original / Factory · Petrol · 500 388hp
MB CLS500 500 original file Bosch HW 0261209208 · SW 381214
Mercedes-Benz CLS500 500 Petrol 285.4 kW (388 HP) Original2007, Petrol, 285.4 kW (388 hp)
388 HP Factory calibration Stock backup file, 530 Nm, Petrol
Calibrated ECU file for 0261209208 (SW 381214). Checksum-corrected, ready to flash. Delivered instantly via secure download after payment.
Performance projection
Matched engine: 500 388hp, M273, 5.5L, Petrol. Engine #4667 in our gains database.
- Power
- 388 HPfactory calibration
- Torque
- 530 Nmfactory calibration
Real data from Gains API. Dyno curve = typical ECU-family projection. Final gains depend on fuel, altitude, wear.
How it works
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Read your ECU
With KESS, KTAG, AutoTuner or Flex. Keep the read: it is your way back.
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Match the numbers
Your read must show hardware 0261209208 and software 381214.
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Pay and download
Card, Apple Pay or Google Pay. The file is in your account straight away.
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Write it and drive
Write it back the way you read it. Not right for your car? We correct it free.
What the car needs
Required modifications: Factory, Petrol.
Hardware
- Factory hardware: no modifications required
Software / calibration
- OEM calibration restored (recovery / immobiliser / coding work)
Original files are used to revert to factory state, repair after a faulty tune, or recover an ECU before service work.
Vehicle & ECU specifications
Exact vehicle, engine and ECU identifiers this calibration file is written for. Cross-check against your ECU before flashing.
| Vehicle make | Mercedes-Benz |
|---|---|
| Vehicle model | Cls500 500 |
| Model year | 2007 |
| Fuel / Induction | Petrol |
| Factory power | 285.4 kW (388 HP) |
| ECU manufacturer | Bosch |
| ECU hardware | 0261209208 |
| ECU software | 381214 |
| Calibration stage | Original (Factory) |
| Cylinder capacity | 5461 CC |
| Compression ratio | 10,7 : 1 |
| Bore × Stroke | 98,0 X 90,5 mm |
| OEM engine code | M273 |
| File format | BIN / ORI |
| Checksum | Pre-corrected (ready to flash) |
| Delivery | Instant download after payment |
Engine performance matrix
Power, torque and fuel-economy figures for every tuning stage on this engine, sourced from the tuning-database Gains API. Values are healthy-engine crank numbers; real on-road gains vary with fuel, altitude and mechanical condition.
| Stage | Power | Torque | Δ HP | Δ Nm |
|---|---|---|---|---|
| Original / Factory | 388 HP | 530 Nm | — | — |
| Stage 1 | 408 HP | 570 Nm | +20 (5.2%) | +40 |
| Stage 2 | 432 HP | 599 Nm | +44 (11.3%) | +69 |
| Stage 3 | 640 HP | 822 Nm | +252 (64.9%) | +292 |
| Stage 4 | 757 HP | 981 Nm | +369 (95.1%) | +451 |
About this calibration file
This is the factory (original) ECU calibration for the 2007 Mercedes-Benz Cls500 500 Petrol, extracted from a genuine stock control unit. Use it as a verified backup before flashing any performance tune, or as a reference when recovering an ECU from a failed write.
This file matches a Bosch ECU with hardware number 0261209208 and software version 381214. Verify both identifiers in your flashing tool before writing — an ID mismatch is the most common cause of a bricked ECU. If you are unsure, upload a read of your original file via the file-request wizard and our engineers will confirm compatibility before you flash.
The file is delivered as a ready-to-flash BIN (and ORI backup where applicable) compatible with all major tools — KESS V2/V3, KTAG, AutoTuner, CMDFlash, Dimsport New Genius, MPPS, Flex, BFlash, PCMFlash, MMFlash — via OBD, bench or boot-mode as supported by your ECU family. Checksums are pre-computed and verified; no additional checksum tool is required. All files include a free revision if post-flash logs reveal a fuelling, boost or EGT issue.
Frequently asked questions
0261209208 (Bosch) listed in the specifications. Read your ECU with any supported tool (KESS, KTAG, AutoTuner, CMD, etc.) and compare the hardware + software numbers against the ones on this page. If they match exactly, the file is a direct fit. If you're not 100% sure, upload your original read via the file-request wizard and our engineers will confirm within minutes — no cost, no obligation.Product details
This product contains a complete original ECU backup (stock file) for MB CLS500 500 2007 Benzin 285.4KW with Bosch 0261209208 and software ID 8K09060G500 (Bosch software number 381214 ( 1037381214 )). This original file corresponds to a factory engine output of approximately 285.4 kW (~388 HP). This file is ideal for ECU cloning, restoring the car back to stock and using it as a safe base for future remaps.
All ECU tuning files from TUNING-DATABASE are prepared for professional use. They are useful whenever you search by ECU ID, hardware or software number such as 0261209208, 8K09060G500, 381214 (1037 + SW code). Use this file for diagnostics, cloning, recovery or as a base for custom remapping.
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