The Mercedes-Benz M 177.984 is a 3,982 cc, V8 petrol engine produced between 2017 and 2023. It features a twin-turbocharged DOHC 32-valve configuration with direct fuel injection (CGI), dry sump lubrication, and high-pressure fuel system (up to 2,000 bar), delivering 450 kW (612 PS) and 850 Nm of torque. This high-performance engine was engineered for AMG GT, E-Class, and S-Class applications requiring maximum power and track capability.
Fitted to the AMG GT (C190), E 63 (W213), and S 63 (C217), the M 177.984 targeted performance enthusiasts seeking rapid throttle response and high-speed stability. Its design prioritized thermal efficiency, reduced turbo lag, and compact packaging, making it ideal for rear-mid and front-mounted high-performance layouts. Emissions compliance was achieved through dual close-coupled catalytic converters and precise lambda control, meeting Euro 6b standards across all markets.
One documented concern is premature wear of the high-pressure fuel pump drive mechanism, particularly under aggressive driving or extended service intervals. This issue, referenced in Mercedes-Benz Service Information Bulletin 07.0042/17, stemmed from torsional stress on the pump cam lobe. Later production units incorporated reinforced drive components and revised inspection intervals to improve durability.
All production years (2017–2023) meet Euro 6b emissions standards (VCA UK Type Approval #VCA/EMS/9123).
The Mercedes-Benz M 177.984 is a 3,982 cc twin-turbocharged V8 petrol engine designed for high-performance AMG models (2017–2023). It combines hot-V turbocharging with direct injection and dry sump lubrication to deliver track-focused performance and driver engagement. Designed to meet Euro 6b emissions standards, it balances extreme power output with everyday drivability in performance-oriented applications.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 3,982 cc | |
| Fuel type | Petrol | |
| Configuration | V8, DOHC, 32-valve | |
| Aspiration | Twin-turbocharged | |
| Bore × stroke | 83.0 mm × 92.0 mm | |
| Power output | 450 kW (612 PS) @ 5,500–6,500 rpm | |
| Torque | 850 Nm @ 2,500–4,500 rpm | |
| Fuel system | Direct fuel injection (CGI), up to 2,000 bar | |
| Emissions standard | Euro 6b | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Twin-scroll turbochargers in 'hot-V' configuration | |
| Timing system | Double-row roller chain (front-mounted) | |
| Oil type | 10W-60 MB-Approval 229.5 | |
| Dry weight | 187 kg |
The twin-turbocharged V8 provides rapid throttle response ideal for performance driving but requires adherence to 15,000 km oil change intervals using 10W-60 MB-Approval 229.5 oil to prevent high-pressure fuel pump and valvetrain wear. Cold-start idling for 20–30 seconds ensures adequate oil pressure to upper components. The CGI fuel system demands high fuel quality (RON 98) to prevent injector coking and maintain combustion stability. Early units (2017–2019) should be inspected for fuel pump drive lobe wear per SIB 07.0042/17; reinforced pump cams and revised inspection protocols were introduced mid-2019. Dry sump system requires periodic oil level checks and scavenge pump function verification.
Oil Specs: Requires MB-Approval 229.5 (10W-60) specification (Mercedes-Benz SIB 07.0042/17). Designed for high-temperature, high-stress applications.
Emissions: All M 177.984 engines comply with Euro 6b standards (VCA Type Approval #VCA/EMS/9123). No Euro 6c variant was produced.
Power Ratings: Measured under DIN 70020 standards. Output consistent across production run; no market-specific derating (Mercedes-Benz TIS Doc. A005925).
Mercedes-Benz Technical Information System (TIS): Docs A005921, A005924, A005925, SIB 07.0042/17
VCA Type Approval Database (VCA/EMS/9123)
SAE International: DIN 70020 Engine Power Measurement Standard
The Mercedes-Benz M 177.984 was used across Mercedes-Benz's C190/W213/C217 platforms with transverse (C190) and longitudinal (W213/C217) mounting and no licensed external applications. This engine received platform-specific adaptations-tuned intake manifolds in the C190 and reinforced engine mounts in the W213-and from 2020 the facelifted W213 received updated ECU mapping, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front timing cover near the harmonic balancer (Mercedes-Benz TIS A005922). The 7th VIN digit indicates engine family ('M' for AMG V8 series). Pre-2019 models have silver cam covers with black valve stem seals; post-2019 units use black cam covers. Critical differentiation from M 178: M 177.984 has a 92.0 mm stroke with dry sump lubrication, while M 178 uses a flat-plane crank and different intake routing. Service parts require production date verification - high-pressure fuel pumps for engines before 06/2019 are incompatible with later units due to drive lobe redesign (Mercedes-Benz SIB 07.0042/17).
The M 177.984's primary reliability risk is premature high-pressure fuel pump drive wear on early builds, with elevated incidence in high-RPM driving. Internal Mercedes-Benz quality reports from 2017 indicated a notable share of pre-2019 engines requiring pump replacement before 120,000 km, while UK DVSA records link a portion of emissions-related MOT failures to catalytic converter degradation in high-mileage vehicles. Track use and delayed maintenance increase pump and chain stress, making oil quality and inspection adherence critical.
Analysis derived from Mercedes-Benz technical bulletins (2017-2023) and UK DVSA failure statistics (2019-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MERCEDES-BENZ M177984.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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