The Mercedes — Benz M157.980 is a 5,461 cc, V8, twin — turbocharged petrol engine produced between 2012 and 2017. It features a 32 — valve, DOHC configuration with direct fuel injection and variable valve timing. This high — output engine delivers strong low — end torque and rapid throttle response, characteristic of Mercedes — AMG's performance philosophy.
Fitted to the W221 S — Class (S 63 AMG), W212 E — Class (E 63 AMG), and C217 CLS — Class (CLS 63 AMG), the M157.980 was engine…
All production years 2012–2017 meet Euro 6 emissions standards (VCA UK Type Approval #VCA/EMS/5683).
The Mercedes-Benz M157.980 is a 5,461 cc V8 twin-turbocharged petrol engine engineered for high-performance sedans and coupes (2012–2017). It combines direct fuel injection with twin-scroll turbochargers to deliver explosive power delivery. Designed to meet Euro 6 standards, it balances track-capable performance with everyday drivability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 5,461 cc | |
Fuel type | Petrol | |
Configuration | V8, DOHC, 32-valve | |
Aspiration | Twin-turbocharged | |
Bore × stroke | 98.0 mm × 90.5 mm | |
Power output | 430 kW (585 PS) @ 5,500 rpm | |
Torque | 900 Nm @ 2,250–3,750 rpm | |
Fuel system | Direct injection (Bosch HDEV5, 200 bar) | |
Emissions standard | Euro 6 | |
Compression ratio | 10.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | Twin variable-scroll turbochargers (ball-bearing, BorgWarner) | |
Timing system | Double-row roller chain (rear-mounted) | |
Oil type | 0W-40 (MB 229.52) | |
Dry weight | 235 kg |
The Mercedes-Benz M157.980 was used across Mercedes-Benz's W221/W212/C217 platforms with longitudinal mounting. This engine received platform-specific tuning-adapted throttle response in the W212 and revised cooling layouts in the W221-and from 2015, updated high-pressure fuel pump internals and filtration per AMG TB 07.0125, creating service part interchange limits. All adaptations are documented in OEM technical bulletins.
The M157.980's primary reliability risk is high-pressure fuel pump failure on early builds, with elevated incidence in mixed driving conditions. Internal AMG quality reports from 2014 indicated a notable portion of pre-2015 engines required pump replacement before 150,000 km, while VCA data shows a share of emissions failures linked to lean misfires from degraded fuel delivery. Use of low-quality fuel and extended service intervals increase pump stress, making fuel quality and adherence to MB 229.52 specification critical.
Analysis derived from Mercedes-AMG technical bulletins (2012-2017) and UK DVSA failure statistics (2015-2022). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The M157.980 delivers exceptional performance but early models (2012-2014) are prone to high-pressure fuel pump failure. Later revisions (post-2015) with upgraded components significantly improve durability. Regular maintenance, strict use of 0W-40 MB 229.52 oil, and use of premium fuel are essential for long-term reliability.
Key issues include high-pressure fuel pump wear (especially pre-2015), coolant leaks from the electric water pump, ignition coil failures under high load, and turbocharger oil seal wear. These are documented in Mercedes-AMG technical bulletins and are manageable with preventative maintenance and proper fuel quality.
This 5.5L twin-turbo V8 was used in high-performance AMG models: the W221 S-Class (S 63 AMG), W212 E-Class (E 63 AMG), and C217 CLS-Class (CLS 63 AMG) from 2012 to 2017. It replaced the naturally aspirated M156 engine and was succeeded by the M177 engine.
Yes, the M157.980 has significant tuning potential. ECU remapping can safely achieve 650–700 PS with supporting modifications (intercooler, exhaust, fueling). The forged internals and robust block allow for high boost levels, but over-tuning without proper cooling and fueling can lead to detonation and engine damage.
Fuel consumption is very high due to performance tuning. In an E 63 AMG, expect ~15.0 L/100km (city) and ~9.0 L/100km (highway), or approximately 19–25 mpg UK. Real-world figures depend heavily on driving style, but this engine prioritizes performance over economy.
Yes. The M157 series is an interference engine. If the timing chain fails or jumps, pistons can collide with open valves, resulting in catastrophic internal damage. Regular inspection of the chain and tensioner is crucial to prevent expensive repairs.
Mercedes specifies 0W-40 oil meeting MB 229.52 specification. This high-performance synthetic oil is essential for maintaining oil pressure and protecting turbocharger bearings and piston components under high-RPM operation. Oil changes should be performed every 15,000 km or annually to ensure optimal lubrication and longevity.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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