Mercedes W211 W219 Becker Audio 50 APS Radio CD Stereo Headunit A2118704589 OEM
This listing is for a USED, GENUINE Mercedes-Benz Audio 50 APS "Mid Headunit" radio stereo console. Manufactured in October 2006 by the premium audio engineering specialist Harman/Becker Automotive Systems, this factory-original (OEM) dashboard controller serves as the central infotainment hub for your vehicle's audio and navigation routing.
🔑 Key Features & Compatibility
| Component | Description / Details | Part Number / Specs |
| Main Item | Audio 50 APS "Mid Headunit" Stereo | CD / Radio / Infotainment Controller |
| Part Number | Primary Mercedes OEM Code | A 211 870 45 89 / A2118704589 |
| Model Number | Harman/Becker Manufacturing Index | BE 7036 / BE7036 |
| Manufacturer | Harman/Becker Automotive Systems | Build Date: 10/06 (October 2006) |
| Platform Gen | NTG1 Architecture System | Supports MOST Fiber Optic Network |
| Fitment | E-Class (W211/S211), CLS-Class (W219) | Mid-2000s to Early-2010s |
| Condition | GOOD USED CONDITION. Front fascia, control buttons, and dual turning knobs are fully intact. |
🔧 Condition Details
"Used, Genuine OEM part. This Harman/Becker head unit has been professionally removed from a donor vehicle and visually inspected. The front faceplate panel is in good cosmetic condition with crisp lettering on the buttons, responsive physical controls, and normal, light surface wear consistent with age. Please see high-resolution photos for the exact cosmetic condition of the item."
📦 Shipping & Delivery Information
Secure Packaging: Sensitive car audio electronics and internal optical laser assemblies require maximum protection. This head unit will be thoroughly wrapped in anti-static bubble wrap and packed securely inside a heavy-duty box to shield it from any shock or vibration during transit.
Fast Dispatch: Ships within 1 business day from our UK warehouse.
Tracked Service: Full tracking and insured delivery provided.
International: Global shipping available via the eBay Global Shipping Programme (GSP).
🔧 Quadlock Connection Pinout Guide (Rear Housing)
This unit utilizes the factory standard Mercedes Quadlock terminal block block layout:
Block A (Power & Data): Pin 12 (Ground - Thick Brown), Pin 15 (+12V Permanent Battery - Thick Red/Yellow), Pin 11 (Amp Turn-on Trigger), Pin 9 (CAN-BUS High), Pin 13 (CAN-BUS Low).
Block B (Analog Audio Outputs): Pins 1-4 (+ Positive leads for Rear R, Front R, Front L, Rear L) / Pins 5-8 (- Negative leads for Rear R, Front R, Front L, Rear L). Note: These analog speaker pins are omitted if your vehicle routes audio through the fiber optic ports.
🚙 Technical & Installation Note
⚠️ FIBER OPTIC WARNING (NTG1 Platform): If your Mercedes features the premium factory Harman Kardon sound system, audio signals bypass Block B completely and are routed via the twin orange fiber optic lines (MOST network) directly to the Audio Gateway (AGW) amplifier module located in the trunk. Ensure these lines are handled carefully and clicked into the lower section of the main plug during install.
Anti-Theft Note: Mercedes units from this generation are typically coded directly to the vehicle's network via the CAN-BUS lines. No manual radio code entry is usually required if swapped into a matching trim, but specialized system clearing or VIN adaptation via diagnostic tools may be needed depending on your car's digital layout.
⚠️ IMPORTANT: Always match your original part number (A 211 870 45 89) and model number (BE 7036) exactly with your existing unit before purchasing to ensure 100% correct electronic and configuration compatibility.