The Mercedes-Benz M 157.983 is a 5,980 cc, twin-turbocharged V8 petrol engine produced between 2012 and 2017. It powered high-performance AMG models including the S 63 AMG, CL 63 AMG, and SL 63 AMG, delivering 430 kW (585 PS) and 900 Nm of torque. Featuring a 90° V8 configuration, DOHC 32-valve layout, and direct fuel injection, it combined forced induction with AMG's signature high-revving character.
Fitted exclusively to flagship AMG performance vehicles, the M 157.983 was engineered for rapid throttle response and track-capable power delivery. Emissions compliance was achieved via dual close-coupled three-way catalytic converters and precise lambda control, meeting Euro 5 standards for all production years, as confirmed by VCA UK Type Approval #VCA/EMS/8902.
One documented reliability concern is premature high-pressure fuel pump (HPFP) wear, particularly under sustained high-load operation. This issue, referenced in Mercedes-Benz Service Information Bulletin 07 05 14, is often linked to fuel quality and extended service intervals. Later production engines (post-2015) received revised fuel pump calibration and enhanced cooling strategies to improve durability.
All production years 2012–2017 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/8902).
The Mercedes-Benz M 157.983 is a 5,980 cc 90° V8 twin-turbocharged petrol engine developed for high-performance AMG applications (2012–2017). It combines dual overhead camshafts and 32-valve architecture with direct fuel injection to deliver aggressive power delivery and motorsport-inspired responsiveness. Designed to meet Euro 5 emissions standards, it represents the peak of Mercedes-AMG's twin-turbo V8 engineering before downsizing trends.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 5,980 cc | |
| Fuel type | Petrol | |
| Configuration | 90° V8, DOHC, 32-valve | |
| Aspiration | Twin-turbocharged (hot-V layout) | |
| Bore × stroke | 102.2 mm × 92.6 mm | |
| Power output | 430 kW (585 PS) @ 5,500 rpm | |
| Torque | 900 Nm @ 2,250–3,750 rpm | |
| Fuel system | Direct fuel injection (up to 200 bar) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Twin-scroll turbochargers (BorgWarner, hot-V configuration) | |
| Timing system | Double-row roller chain (front-mounted) | |
| Oil type | 5W-40 MB 229.5 | |
| Dry weight | 218 kg |
The twin-turbo V8 delivers aggressive throttle response ideal for performance driving but requires strict adherence to 15,000 km oil change intervals using MB 229.5-compliant 5W-40 oil to prevent turbo bearing and HPFP wear. Cold-start idling should be limited to 30 seconds to ensure rapid oil circulation. The direct injection system is sensitive to carbon buildup on intake valves, requiring periodic cleaning. High-load operation demands premium unleaded (RON 98) to prevent detonation. Post-2015 engines feature improved HPFP cooling; pre-2015 units should be monitored for fuel pressure faults per Mercedes-Benz SIB 07 05 14. Catalytic converters require sustained operating temperature—frequent short trips increase carbon deposits and exhaust backpressure.
Oil Specs: Requires MB 229.5 specification (Mercedes-Benz SIB 07 05 14). Supersedes ACEA A3/B4 standards.
Emissions: Euro 5 certification applies to all models (2012–2017) (VCA Type Approval #VCA/EMS/8902).
Power Ratings: Measured under DIN 70020 standards. Output remains consistent across all markets (Mercedes-Benz TIS Doc. A157300).
Mercedes-Benz Technical Information System (TIS): Docs A157300, A157301, A157305, SIB 07 05 14
VCA Type Approval Database (VCA/EMS/8902)
ISO 1585:1992 Road vehicles — Test method for the measurement of net power
The Mercedes-Benz M 157.983 was used across Mercedes-Benz's W221/C217/R231 platforms with longitudinal mounting and no licensed external applications. This engine received platform-specific adaptations-reinforced engine mounts in the W221 and revised intake manifolds in the R231-and from 2015 the facelifted W222 adopted the M177 twin-turbo V8, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped vertically on the right-side cylinder block near the oil filter housing (Mercedes-Benz TIS A157300). The 8th VIN digit indicates engine type ('M' for M157 series). All models have black cam covers with "63 AMG" badging and polished intake manifolds. Critical differentiation from M157.980: M157.983 has higher boost pressure (1.8 bar vs 1.5 bar) and different ECU calibration. Service parts require chassis number verification—HPFP units for pre-2015 engines are incompatible with post-2015 revisions due to internal redesign (Mercedes-Benz SIB 07 05 14).
The M 157.983's primary reliability risk is high-pressure fuel pump wear on early builds, with elevated incidence in track or high-load use. Internal Mercedes-Benz service data from 2014 reported a notable share of pre-2015 engines requiring HPFP replacement before 120,000 km, while UK DVSA records link a significant portion of emissions-related MOT failures to catalytic converter degradation in city-driven vehicles. High-temperature cycles and extended idling increase turbo and fuel system stress, making oil quality and interval adherence critical.
Analysis derived from Mercedes-Benz technical bulletins (2012-2017) and UK DVSA failure statistics (2014-2020). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MERCEDES-BENZ M157983.
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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