Every control module on the 2024-2026 Mercedes-Benz C63 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.
Electric Power Steering Control Unit (EPS) 3.5 hr R&R security gateway +1.5 hr ▸ programming details
📍 Steering column, integrated with steering rack assembly
🔧 Xentry Diagnostics + SCN online
⚠️ Requires steering angle sensor calibration and SCN coding. AMG-specific steering calibration.
Rear Axle Steering Control Unit (RAS) 2.5 hr R&R security gateway +2.0 hr ▸ programming details
📍 Rear undercarriage, integrated with rear axle assembly
🔧 Xentry Diagnostics + SCN online
⚠️ AMG rear-wheel steering. Requires rear axle alignment and SCN coding after replacement.
Transmission Control Unit (TCU) 2.5 hr R&R security gateway +1.5 hr ▸ programming details
📍 Transmission bell housing, driver side
🔧 Xentry Diagnostics + SCN online
⚠️ AMG Speedshift MCT 9-speed. Requires transmission fluid drain, VIN-lock and SCN coding mandatory.
Central Gateway Module (CGW) 2.0 hr R&R security gateway +2.5 hr ▸ programming details
📍 Under dashboard, center console area behind trim
🔧 Xentry Diagnostics + SCN online
⚠️ Security gateway. Replacement requires complete vehicle network reconfiguration and all module re-pairing.
Climate Control Unit (CCU) 2.0 hr R&R dealer / factory tool +0.5 hr ▸ programming details
📍 Behind center dashboard, above transmission tunnel
🔧 Xentry Diagnostics
⚠️ Requires variant coding for dual-zone configuration.
Head Unit / MBUX (HU/MBUX) 1.8 hr R&R security gateway +1.5 hr ▸ programming details
📍 Center dashboard, integrated with center stack
🔧 Xentry Diagnostics + SCN online
⚠️ MBUX system with 11.9-inch portrait or 12.3-inch landscape display. Requires SCN coding and user profile transfer.
Rear Signal Acquisition and Actuation Module (SAM-R) 1.5 hr R&R security gateway +1.5 hr ▸ programming details
📍 Trunk, driver side rear panel behind trim
🔧 Xentry Diagnostics + SCN online
⚠️ Controls rear lighting, fuel pump relay, and trunk functions.
48V Battery Management System (BMS) 1.5 hr R&R security gateway +1.5 hr ▸ programming details
📍 Trunk, passenger side rear panel
🔧 Xentry Diagnostics + SCN online
⚠️ 48V lithium-ion battery management. Requires high-voltage safety procedures and SCN coding.
Camera Control Unit / Surround View (CCU) 1.5 hr R&R security gateway +1.5 hr ▸ programming details
📍 Trunk, passenger side rear panel
🔧 Xentry Diagnostics + SCN online
⚠️ 360-degree camera system. Requires camera calibration and SCN coding.
Electronic Ignition Switch (EIS) 1.5 hr R&R security gateway +2.0 hr ▸ programming details
📍 Steering column, integrated with ignition lock assembly
🔧 Xentry Diagnostics + SCN online + Xentry Key Programming
⚠️ VIN-locked. Requires all keys to be present for programming. Forms security triangle with ECM and cluster.
Intelligent Light System Control Unit (ILS) 1.2 hr R&R dealer / factory tool +0.8 hr ▸ programming details
📍 Each headlight assembly (left and right modules)
🔧 Xentry Diagnostics
⚠️ Digital Light or Multibeam LED headlights. Requires headlight aim calibration and variant coding for adaptive functions.
Motor Electronics / Engine Control Unit (ME/ECU) 1.2 hr R&R security gateway +1.5 hr ▸ programming details
📍 Engine bay, driver side firewall mounted below brake master cylinder
🔧 Xentry Diagnostics + SCN online
⚠️ VIN-locked, requires SCN coding and EIS pairing. AMG-specific calibration files require dealer authorization. 4.0L V8 biturbo with mild hybrid (ISG).
Adaptive Damping System Control Unit (ADS) 1.2 hr R&R dealer / factory tool +1.0 hr ▸ programming details
📍 Trunk, passenger side rear panel
🔧 Xentry Diagnostics + SCN online
⚠️ AMG Ride Control+. Requires ride height calibration and variant coding.
Parktronic Control Unit (PTS) 1.0 hr R&R dealer / factory tool +0.5 hr ▸ programming details
📍 Trunk, center rear panel behind trim
🔧 Xentry Diagnostics
⚠️ Parking sensors. Requires sensor calibration after replacement.
Electronic Stability Program Control Unit (ESP/ABS) 1.0 hr R&R security gateway +1.0 hr ▸ programming details
📍 Engine bay, driver side inner fender near shock tower
🔧 Xentry Diagnostics + SCN online
⚠️ Integrated hydraulic unit. Requires brake bleed after replacement and SCN coding.
Instrument Cluster (IC) 1.0 hr R&R security gateway +1.5 hr ▸ programming details
📍 Dashboard, behind steering wheel
🔧 Xentry Diagnostics + SCN online
⚠️ VIN-locked, mileage programming requires dealer authorization and legal documentation. 12.3-inch digital display.
Door Control Module (DCM) 1.0 hr R&R dealer / factory tool +0.5 hr ▸ programming details
📍 Inside each door (4 modules total)
🔧 Xentry Diagnostics
⚠️ Controls windows, mirrors, locks. Requires variant coding and window initialization.
Radar Sensor / DISTRONIC Control Unit (RSU) 1.0 hr R&R security gateway +1.5 hr ▸ programming details
📍 Front bumper, center behind grille
🔧 Xentry Diagnostics + SCN online
⚠️ Adaptive cruise control. Requires radar alignment with special tool and SCN coding.
Telematics Communication Module (TCM) 1.0 hr R&R security gateway +1.0 hr ▸ programming details
📍 Trunk, driver side rear panel or under rear seat
🔧 Xentry Diagnostics + SCN online
⚠️ Mercedes me connect with 5G capability. Requires subscription activation and VIN registration.
Fuel Pump Control Module (FPCM) 0.8 hr R&R aftermarket tool +0.3 hr ▸ programming details
📍 Trunk, driver side rear panel near SAM-R
🔧 Xentry Diagnostics or Autel
⚠️ Simple variant coding, most aftermarket tools can handle.
Restraint Systems Control Unit (SRS) 0.8 hr R&R security gateway +1.0 hr ▸ programming details
📍 Center console, under front armrest
🔧 Xentry Diagnostics + SCN online
⚠️ VIN-locked. Requires crash data clear and component configuration after replacement.
Seat Control Module (SCM) 0.8 hr R&R dealer / factory tool +0.5 hr ▸ programming details
📍 Under each front seat (driver and passenger)
🔧 Xentry Diagnostics
⚠️ AMG Performance seats. Requires variant coding for memory and massage functions.
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?
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