Mercedes-Benz M271 EVO (1.8L CGI Turbo M271.820 / M271.860) Diesel Injector
Cross-Reference & Technical Specs
Authoritative technical specifications, verified Bosch part numbers, control valve stamping codes, nozzle spray orifices, and hold-down tightening torque for the Mercedes-Benz M271 EVO diesel engine family.
All Verified Part Numbers for Mercedes-Benz M271 EVO (1.8L CGI Turbo M271.820 / M271.860)
The following 2 common-rail injector assemblies are calibrated for this engine family. Click any SKU to view individual test bench flow curves, sister cross-references, and vehicle applications.
Integrated Pulse-Width Modulated Electric Spill Valve (SCV)Nozzle Code: See Product DetailIntegrated Pulse-Width Modulated Quantity Control SolenoidNozzle Code: See Product Detail| Part Number (SKU) | Primary OE Reference | Control Valve | Nozzle Code |
|---|---|---|---|
| A2710702201, 2710702201, A2710703501 | Integrated Pulse-Width Modulated Electric Spill Valve (SCV) | See Product Detail | |
| A2710700401, 2710700501, 2710700401 | Integrated Pulse-Width Modulated Quantity Control Solenoid | See Product Detail |
Verified Vehicle Compatibility
| Make / Manufacturer | Vehicle Model & Platform | Engine Specification | Model Years |
|---|---|---|---|
| Mercedes-Benz | C-Class W204 C250 CGI | Mercedes-Benz M271 EVO (1.8L CGI Turbo M271.820 / M271.860) | 2009-2014 |
| Mercedes-Benz | E-Class W212 E250 CGI | Mercedes-Benz M271 EVO (1.8L CGI Turbo M271.820 / M271.860) | 2009-2016 |
| Mercedes-Benz | SLK-Class R172 SLK250 | Mercedes-Benz M271 EVO (1.8L CGI Turbo M271.820 / M271.860) | 2011-2016 |
| Mercedes-Benz | C250 CGI W204 | Mercedes-Benz M271 EVO (1.8L CGI Turbo M271.820 / M271.860) | 2012-2015 |
| Mercedes-Benz | SLK250 R172 | Mercedes-Benz M271 EVO (1.8L CGI Turbo M271.820 / M271.860) | 2012-2016 |
| Mercedes-Benz | E250 CGI W212 | Mercedes-Benz M271 EVO (1.8L CGI Turbo M271.820 / M271.860) | 2009-2016 |
Installation, Tightening Torque & Re-torque Protocol
Strict torque compliance is mandatory on Mercedes-Benz M271 EVO (1.8L CGI Turbo M271.820 / M271.860) common-rail cylinder heads. Over-torquing stretches the injector body or strips the head clamping threads, while under-torquing allows combustion blow-by past the copper sealing washer:
- Hold-down clamp bolt: 12 N·m (cold state). Always clean the cylinder head recess with an injector seat reamer.
- High-pressure rail flare nut: 25-30 N·m using a dedicated 17 mm line wrench.
- Return leak-off banjo bolt: 9-12 N·m with fresh copper washers on both sides of the banjo union.
After fitting replacement injectors on Mercedes-Benz M271 EVO (1.8L CGI Turbo M271.820 / M271.860), generate or program the cylinder-specific IMA calibration code into the engine ECU using an OEM-level scan tool (Bosch KTS, Renault CLIP, or VAG-COM) to prevent cylinder power imbalance and rough idle.
Technical Diagnostics FAQ for Mercedes-Benz M271 EVO (1.8L CGI Turbo M271.820 / M271.860)
What DTC fault codes indicate a failing injector on Mercedes-Benz M271 EVO (1.8L CGI Turbo M271.820 / M271.860)?
The most frequent fault codes are P0201 through P0204 (Injector Circuit Malfunction on Cylinders 1-4), P2146/P2149 (Injector Group Supply Voltage Error), and P0087 (Fuel Rail Pressure Low due to excessive internal leak-off). Measure solenoid coil resistance across the pins (0.5-1.5 Ω) and perform a graduated-bottle dynamic leak-back test to pinpoint the leaking cylinder.
Can sister SKUs within the Mercedes-Benz M271 EVO (1.8L CGI Turbo M271.820 / M271.860) family be interchanged?
Not unless explicitly confirmed on the vehicle build plate. While sister SKUs share the same physical outer envelope and Integrated Pulse-Width Modulated Electric Spill Valve (SCV) control valve, they differ in nozzle spray orifice angle and factory IMA flow calibration. Mixing sister SKUs on the same engine block can trigger rough idle, elevated exhaust gas temperatures (EGT), and MOT emissions failure.
Which specific Bosch injectors fit the Mercedes-Benz M271 EVO (1.8L CGI Turbo M271.820 / M271.860) engine?
The verified genuine Bosch common-rail injectors engineered for the Mercedes-Benz M271 EVO (1.8L CGI Turbo M271.820 / M271.860) engine family are:
- Bosch 0261520215 Common Rail Injector → (OE: A2710702201, 2710702201, A2710703501, 2710703501, A2710703701, 2710703701, 0261520216) — Control Valve: Integrated Pulse-Width Modulated Electric Spill Valve (SCV),
- Bosch A2710700501 Common Rail Injector → (OE: A2710700401, 2710700501, 2710700401, 5WK97000) — Control Valve: Integrated Pulse-Width Modulated Quantity Control Solenoid,