Replacement ECU Engine Computer Board Control Module
Fits Mercedes‑Benz W221 S550 / CL550 (2004-2010)
Compatible part numbers: A2731535079, A2731533079, A2731536591
Product overview
High-quality replacement engine control unit (ECU) circuit/board designed to meet original factory specifications. Easy to install and engineered to provide reliable performance and consistent operation for your Mercedes‑Benz W221 S550 or CL550.
Features
- Meets original factory specifications for fit and function
- Easy to install – designed as a direct replacement
- Reliable performance and consistent operation
- Manufactured and quality‑checked in our specialized factory
- Sufficient stock available for quick fulfillment
Compatibility / Fitment
Designed as a replacement for the following vehicles and part numbers:
- Mercedes‑Benz W221 S550 (2004-2010)
- Mercedes‑Benz CL550 (2004-2010)
- Compatible part numbers: A2731535079, A2731533079, A2731536591
Please verify your vehicle model, year, and part number before purchasing to ensure correct fitment.
Quality & manufacturing
Produced in our specialized factory with quality control measures in place. The product is inspected to match the description and performance expectations.
Installation & notes
- Installation should follow vehicle manufacturer procedures.
- Professional installation is recommended if you are not experienced with ECU replacement.
- Confirm part number and physical fit before installation.
Customer service
If you have any questions or need assistance, please contact us. We’re committed to providing a positive shopping experience and prompt support.
Pre‑purchase checklist
- Double‑check your vehicle model and year (2004-2010 W221 S‑Class / CL‑Class)
- Confirm the existing ECU part number matches one of: A2731535079, A2731533079, A2731536591
- Ensure you have the proper tools or a professional installer for replacement
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