Fitment notes: AGM required for start-stop system; battery located in engine compartment
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Every control module on the 2020-2026 Mercedes-Benz GLB250 X247 — 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.
Electric Power Steering Control Unit (EPS)3.5 hr R&Rsecurity gateway +1.0 hr▸ programming details
📍 Steering column, integrated with steering rack (rack-mounted)
🔧 Xentry Diagnostics + SCN online
⚠️ Rack replacement typically required with module. Steering angle sensor calibration mandatory after coding.
Transmission Control Unit (TCU)2.5 hr R&Rsecurity gateway +1.0 hr▸ programming details
📍 Transmission housing, driver side near valve body (8G-DCT)
📍 Rear cargo area, right side panel near hitch (if equipped)
🔧 Xentry Diagnostics
⚠️ Optional equipment. Variant coding required to enable trailer functions in SAM-R.
Fuel Pump Control Module (FPCM)0.5 hr R&Rno coding
📍 Rear cargo area, left side panel (controlled via SAM-R relay)
⚠️ Simple relay control via SAM-R, not a standalone programmable module on GLB250.
Tire Pressure Monitoring Control Unit (TPMS)0.5 hr R&Rrelearn only +0.3 hr▸ programming details
📍 Integrated into ESP/ABS module (indirect system) or separate receiver under dash
🔧 Xentry Diagnostics or Autel TPMS tool
⚠️ Sensor ID relearn required after tire rotation or sensor replacement. Indirect system uses ABS wheel speed sensors.
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 GLB250 X247 2.0L I4 Turbo M260 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.