🌍 International coverage, work in progress. This Russian-market vehicle is part of our hand-curated international catalog. We are filling in labor times, torque specs and fluids as fast as we can verify them, so some numbers may be missing or marked estimated for now. Do you work on these vehicles in the EU, Russia, or the JDM scene? Help us get it right: send real shop times or corrections to [email protected], or request the data you need and it joins the verification queue.
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2025 MERCEDES-BENZ GLA45 AMG

2.0L I4 Turbo M139•AWD•AUTOMATIC•gas•M139•turbo
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Dead battery / stuck in Park? Emergency neutral procedure for this GLA45 AMG →
Every control module on the 2020-2026 Mercedes-Benz GLA45 AMG — 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)2.5 hr R&Rsecurity gateway +1.2 hr▸ programming details
📍 Transmission housing, driver side
🔧 Xentry Diagnostics + SCN coding
⚠️ Requires transmission fluid change. SCN coding and extensive adaptation. Gateway authentication required.
4MATIC Control Unit (4M)2.0 hr R&Rsecurity gateway +0.8 hr▸ programming details
📍 Transfer case housing, center undercarriage
🔧 Xentry Diagnostics + SCN coding
⚠️ Transfer case fluid change required. Road test and adaptation. Gateway-protected on 2020+ models.
Electronic Stability Program Control Unit (ESP/ABS)1.5 hr R&Rsecurity gateway +0.8 hr▸ programming details
📍 Engine bay, left front near fender
🔧 Xentry Diagnostics + SCN coding
⚠️ Brake bleeding required. Steering angle sensor calibration. Gateway-protected module.
Head Unit / MBUX (HU/MBUX)1.5 hr R&Rsecurity gateway +0.8 hr▸ programming details
📍 Dashboard, center stack
🔧 Xentry Diagnostics + SCN coding
⚠️ MBUX system requires extensive coding. Navigation and voice control activation. Gateway-protected.
Signal Acquisition and Actuation Module - Rear (SAM-R)1.5 hr R&Rsecurity gateway +1.2 hr▸ programming details
📍 Rear cargo area, left side panel
🔧 Xentry Diagnostics + SCN coding
⚠️ Gateway-protected. Controls rear electrical functions. VIN-locked, SCN coding required.
Central Gateway Module (CGW)1.5 hr R&Rsecurity gateway +2.0 hr▸ programming details
📍 Dashboard, left side near SAM-F
🔧 Xentry Diagnostics + SCN coding
⚠️ Critical security gateway module. All other modules may require recoding after replacement. Dealer-only procedure.
Electric Power Steering Control Unit (EPS)1.3 hr R&Rsecurity gateway +0.7 hr▸ programming details
📍 Steering column, under dashboard
🔧 Xentry Diagnostics + SCN coding
⚠️ Gateway-protected. Steering angle sensor calibration and road test required after coding.
Motor Electronics / Engine Control Unit (ME/ECU)1.2 hr R&Rsecurity gateway +1.0 hr▸ programming details
📍 Engine bay, left side firewall near brake master cylinder
🔧 Xentry Diagnostics + SCN coding
⚠️ VIN-locked with enhanced security gateway. Requires online Mercedes authorization. EIS security triangle pairing mandatory.
Climate Control Unit (CCU)1.0 hr R&Rdealer / factory tool +0.5 hr▸ programming details
📍 Dashboard, center behind HVAC controls
🔧 Xentry Diagnostics + SCN coding
⚠️ Refrigerant recovery if lines disconnected. Coding for vehicle-specific options and zones.
Electronic Ignition Switch (EIS)1.0 hr R&Rsecurity gateway +1.5 hr▸ programming details
📍 Steering column, ignition switch area
🔧 Xentry Diagnostics + SCN coding
⚠️ All keys must be programmed. Security triangle with ECM and cluster. Gateway-protected. Tow-in required if failed.
Radar Sensor / DISTRONIC Control Unit (RSU)1.0 hr R&Rsecurity gateway +1.0 hr▸ programming details
📍 Front bumper, center behind grille
🔧 Xentry Diagnostics + SCN coding
⚠️ Radar alignment mandatory with specific target. Gateway-protected. Road test required. ADAS calibration critical.
Adaptive Damping System Control Unit (ADS)1.0 hr R&Rdealer / factory tool +0.6 hr▸ programming details
📍 Front left wheel well area
🔧 Xentry Diagnostics + SCN coding
⚠️ Ride height calibration required. Road test for adaptation learning. AMG Ride Control coding if equipped.
Instrument Cluster (IC)0.9 hr R&Rsecurity gateway +1.0 hr▸ programming details
📍 Dashboard, behind steering wheel
🔧 Xentry Diagnostics + SCN coding
⚠️ VIN-locked, gateway-protected. Mileage programming required. Part of EIS security triangle. Digital cluster on later models.
Tailgate Control Module (TGM)0.8 hr R&Raftermarket tool +0.3 hr▸ programming details
📍 Tailgate, left side panel
🔧 Xentry or Autel MaxiSys Ultra
⚠️ Power liftgate height relearn. Kick sensor calibration. Hands-free access coding if equipped.
Restraint Systems Control Unit (SRS)0.8 hr R&Rsecurity gateway +0.6 hr▸ programming details
📍 Center console, under front seats
🔧 Xentry Diagnostics + SCN coding
⚠️ VIN-locked, gateway-protected. Crash data clearing requires dealer tool. All airbag components verified before coding.
Intelligent Light System Control Unit (ILS)0.8 hr R&Rdealer / factory tool +0.5 hr▸ programming details
📍 Each headlight assembly
🔧 Xentry Diagnostics + SCN coding
⚠️ LED/Multibeam headlights require extensive calibration. Headlight aim adjustment mandatory.
Camera Control Unit / Surround View (CCU)0.7 hr R&Rdealer / factory tool +0.6 hr▸ programming details
📍 Behind rearview mirror or rear license plate area
🔧 Xentry Diagnostics + SCN coding
⚠️ 360-degree camera calibration and alignment. Dynamic guidelines coding. Multiple camera system on later models.
Door Control Module (DCM)0.7 hr R&Raftermarket tool +0.3 hr▸ programming details
📍 Inside each door panel
🔧 Xentry or Autel MaxiSys Ultra
⚠️ Window initialization required. Mirror memory relearn. Ambient lighting coding if equipped.
Telematics Communication Module (TCM)0.7 hr R&Rsecurity gateway +0.8 hr▸ programming details
📍 Under rear seat or cargo area
🔧 Xentry Diagnostics + SCN coding
⚠️ Mercedes me connect subscription reactivation. eSIM programming. Gateway-protected module.
Fuel Pump Control Module (FPCM)0.6 hr R&Raftermarket tool +0.2 hr▸ programming details
📍 Under rear seat or in trunk near fuel tank
🔧 Xentry or Autel MaxiSys Ultra
⚠️ Basic adaptation usually sufficient. Fuel pressure test after replacement.
Parktronic Control Unit (PTS)0.6 hr R&Raftermarket tool +0.2 hr▸ programming details
📍 Rear bumper area, behind trim
🔧 Xentry or Autel MaxiSys Ultra
⚠️ Sensor calibration required. Active parking assist coding if equipped.
Exhaust Flap Control Module (EFCM)0.5 hr R&Raftermarket tool +0.2 hr▸ programming details
📍 Rear undercarriage near exhaust
🔧 Xentry or Autel MaxiSys Ultra
⚠️ AMG performance exhaust. Flap position relearn required. Sound mode coding.
Seat Control Module (SCM)0.5 hr R&Raftermarket tool +0.3 hr▸ programming details
📍 Under each front seat
🔧 Xentry or Autel MaxiSys Ultra
⚠️ Memory seat relearn required. Occupancy sensor calibration if equipped. Massage function coding if applicable.
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.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years.
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