Fitment notes: Auxiliary 12V battery for vehicle systems; located in cargo area
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Every control module on the 2022-2026 Mercedes-Benz EQB — 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.
Battery Management System / High Voltage Control Unit (BMS / HVCU)4.5 hr R&Rsecurity gateway +1.5 hr▸ programming details
📍 Under rear cargo floor, integrated with high-voltage battery pack
🔧 Xentry Diagnostics + SCN online
⚠️ Critical safety component; requires high-voltage isolation verification before and after replacement; VIN-locked with battery serial number pairing
Motor Electronics / Electric Drive Control Unit (ME / EDU)2.5 hr R&Rsecurity gateway +1.2 hr▸ programming details
📍 Front motor compartment, mounted on electric drive unit housing
🔧 Xentry Diagnostics + SCN online
⚠️ VIN-locked; requires online SCN authorization from Mercedes servers; controls both front and rear electric motors on 4MATIC models
Electric Power Steering Control Unit (EPS)2.0 hr R&Rsecurity gateway +0.8 hr▸ programming details
📍 Integrated with steering column assembly, below dashboard
🔧 Xentry Diagnostics + SCN online
⚠️ Steering angle sensor calibration required after replacement; VIN-locked
📍 Steering column, integrated with start button assembly
🔧 Xentry Diagnostics + SCN online
⚠️ Critical security component; key programming requires online authorization; part of security triangle with IC and CGW; all keys must be present for programming
MBUX Head Unit (HU / MBUX)1.5 hr R&Rdealer / factory tool +1.0 hr▸ programming details
📍 Center dashboard, integrated with touchscreen display
🔧 Xentry Diagnostics + SCN online
⚠️ VIN-locked; requires online activation for navigation and connected services; software version must match vehicle configuration
Electronic Stability Program Control Unit (ESP / ABS)1.2 hr R&Rsecurity gateway +0.8 hr▸ programming details
📍 Front left corner of motor compartment, near brake master cylinder
🔧 Xentry Diagnostics + SCN online
⚠️ Integrated hydraulic unit; brake bleeding required after replacement; VIN-locked
Intelligent Light System Control Unit (ILS)1.2 hr R&Rdealer / factory tool +0.5 hr▸ programming details
📍 Integrated in each headlight assembly
🔧 Xentry Diagnostics
⚠️ LED headlight assemblies; headlight aim calibration required after replacement; left and right modules are side-specific
⚠️ VIN-locked; mileage programming requires online authorization; part of security triangle with CGW and EIS
Door Control Module (DCM)1.0 hr R&Rdealer / factory tool +0.4 hr▸ programming details
📍 Inside each door (four total)
🔧 Xentry Diagnostics
⚠️ Window initialization required after replacement; controls windows, mirrors, and door locks per door
Radar Sensor / DISTRONIC Control Unit (RSU)1.0 hr R&Rsecurity gateway +1.2 hr▸ programming details
📍 Front bumper, center behind Mercedes star emblem
🔧 Xentry Diagnostics + SCN online + calibration
⚠️ VIN-locked; requires static and dynamic calibration after replacement; bumper removal required; critical for adaptive cruise and collision prevention
Restraint Systems Control Unit (SRS)0.9 hr R&Rsecurity gateway +0.7 hr▸ programming details
📍 Center console, below front center armrest
🔧 Xentry Diagnostics + SCN online
⚠️ VIN-locked; requires crash data clearing and occupant classification system calibration after replacement
Parktronic Control Unit (PTS)0.8 hr R&Rdealer / factory tool +0.3 hr▸ programming details
📍 Behind rear bumper, center
🔧 Xentry Diagnostics
⚠️ Sensor calibration required after replacement; integrated with surround view system
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 EQB Electric and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.