Fitment notes: AGM battery required for start-stop system; located under hood
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Every control module on the 2020-2026 Mercedes-Benz GLE — 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)3.5 hr R&Rsecurity gateway +1.0 hr▸ programming details
📍 Transmission bell housing or valve body (internal on 9G-TRONIC)
🔧 Xentry Diagnostics + SCN online
⚠️ 9G-TRONIC units integrated into valve body. Requires transmission oil change and adaptation. VIN-locked.
4MATIC Control Unit (4M)2.5 hr R&Rdealer / factory tool +0.8 hr▸ programming details
📍 On or near transfer case, under vehicle
🔧 Xentry Diagnostics
⚠️ Controls all-wheel-drive torque distribution. Only on 4MATIC models. Requires adaptation after replacement.
Hybrid Control Unit / Battery Management System (HCU/BMS)2.5 hr R&Rsecurity gateway +1.5 hr▸ programming details
📍 Under rear cargo floor or near battery pack
🔧 Xentry Diagnostics + SCN online
⚠️ Controls 48V mild hybrid system or plug-in hybrid (GLE 350de/550e). Requires high-voltage safety procedures and SCN coding. Only on hybrid models.
Electric Power Steering Control Unit (EPS)2.5 hr R&Rsecurity gateway +1.0 hr▸ programming details
📍 Steering column or rack housing
🔧 Xentry Diagnostics + SCN online
⚠️ Requires steering angle sensor calibration and SCN coding. Standard on most 2020+ models.
Climate Control Unit (CCU)2.5 hr R&Rdealer / factory tool +0.5 hr▸ programming details
📍 Behind center dashboard, above transmission tunnel
🔧 Xentry Diagnostics
⚠️ Requires dashboard removal for access. Coding needed for multi-zone configuration.
⚠️ Controls power seat, memory, heating, ventilation, massage. Basic coding for seat configuration. Two modules on equipped vehicles.
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 GLE 3.0L Turbo V6 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.