A2740700501
BOSCH A2740700501 High Pressure Fuel Pump Mercedes-Benz C300 E300 GLC300 2.0T M274 0261520215
2740700501, A2740700401, 0261520215, 0261520216Integrated Solenoid Quantity Control Valve (Flow Metering)-200 barVehicle & Engine Fitment
| Vehicle | Engine | Years |
|---|---|---|
| Mercedes-Benz C300 W205 | Mercedes-Benz M270 / M274 (1.6L & 2.0L BlueDIRECT Turbo) | 2015-2021 |
| Mercedes-Benz E300 W213 | Mercedes-Benz M270 / M274 (1.6L & 2.0L BlueDIRECT Turbo) | 2017-2020 |
| Mercedes-Benz GLC300 X253 | Mercedes-Benz M270 / M274 (1.6L & 2.0L BlueDIRECT Turbo) | 2016-2020 |
Technical Specifications
| Specification | Value |
|---|---|
| System Type | Camshaft-Driven Single-Piston High-Pressure Fuel Pump (HPFP) |
| Operating PressureCore Spec | |
| Drive Mechanism | Three-lobe exhaust camshaft actuation with roller tappet bucket |
| Flange Mounting Bolt Torque | 12 N·m (tighten evenly in cross-pattern to prevent housing tilt) |
| High Pressure Line Torque | 27 N·m (high pressure steel flare nut connection) |
| Flow Control Valve ResistanceCore Spec | |
| Common Fault Codes | P0087 (Fuel Rail Pressure Too Low), P0088 (Fuel Rail Pressure Too High), P0016 (Camshaft Correlation) |
| Workshop Precaution | Inspect roller tappet for wear prior to installation; check engine oil for gasoline dilution odor |
Matched High-Pressure Fuel Pump (Fuel Circuit Assembly)
Operates on the same high-pressure rail circuit. When troubleshooting low rail pressure (DTC P0087), verify pump volumetric delivery before replacing injectors.
Installation Tips
- [
- {
- "step": 1,
- "title": "Relieve Fuel Line Residual Pressure & Disconnect Battery",
- "instruction": "Disconnect negative battery lead. De-pressurize low-pressure fuel circuit and cover HPFP with shop towels to catch fuel discharge during line disconnection."
- },
- {
- "step": 2,
- "title": "Remove Acoustic Cover & Detach Fuel Flow Control Plug",
- "instruction": "Unclip sound deadening foam around pump housing. Disconnect electrical connector from integrated fuel volume metering solenoid."
- },
- {
- "step": 3,
- "title": "Inspect Camshaft Roller Tappet & Fit New Viton O-Ring",
- "instruction": "Evenly loosen dual flange mounting bolts half-turn at a time. Withdraw HPFP and remove roller tappet. Inspect tappet surface for scuffing and lubricate with fresh engine oil."
- },
- {
- "step": 4,
- "title": "Install HPFP, Torque Mounting Bolts & Reconnect Lines",
- "instruction": "Position HPFP onto cylinder head. Alternately tighten mounting bolts to 12 N·m. Torque high pressure outlet flare nut to 27 N·m. Start engine and verify zero fuel weepage."
- }
- ]
Diagnostic Trouble Codes & Fault Protocols
Common diagnostic trouble codes (DTCs) triggered when this common rail injector experiences wear, circuit faults, or calibration drift:
Fuel Rail / System Pressure Too Low
Excessive internal backleak from worn control valve seats drops common rail pressure below target under engine load.
Injector Circuit Malfunction / Open Circuit
Solenoid coil resistance drift (0.2-0.5 Ω) or piezo stack degradation triggers driver stage shutdown on affected cylinders.
Cylinder Misfire & Balancing Deviation
Carbon-clogged nozzle spray holes or missing IMA calibration causes uneven cylinder contribution. Recode ECM and verify washer seating.
Fuel Rail / System Pressure Too High
Spill line backpressure or stuck metering valve prevents rail depressurization, creating overpressure risks under load.
Technical Diagnostic & Service Protocols
Authoritative field procedures, diagnostic testing thresholds, and service SOPs for this assembly.