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Fitment notes: AGM battery required for start-stop system; located in trunk; primary battery with secondary auxiliary battery
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Every control module on the 2021-2026 Mercedes-Benz S580 Maybach W223 — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
Transmission Control Unit (TCU)8.5 hr R&Rsecurity gateway +1.2 hr▸ programming details
📍 Transmission housing, integrated valve body (9G-TRONIC)
🔧 Xentry Diagnostics + SCN online
⚠️ Requires transmission oil change, adaptation drive cycle, and online SCN coding. Valve body removal required.
Electric Power Steering Control Unit (EPS)3.5 hr R&Rsecurity gateway +1.0 hr▸ programming details
📍 Steering column, integrated with steering gear
🔧 Xentry Diagnostics + SCN online
⚠️ Requires steering angle sensor calibration and road test adaptation after replacement.
MBUX Head Unit (HU/MBUX)2.8 hr R&Rsecurity gateway +1.5 hr▸ programming details
📍 Dashboard, center stack behind display
🔧 Xentry Diagnostics + SCN online
⚠️ 12.8-inch OLED display. Requires MBUX software installation and user profile transfer. Display removal requires special tools.
⚠️ Short-range radar for blind spot and rear cross-traffic. Requires calibration after replacement.
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2026 Mercedes-Benz S580 Maybach W223 4.0L V8 BiTurbo M176 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Mechanic · 20+ years.