FuelPartsDB · WORKSHOP TECHNICAL SERVICE

DOC REF: SOP-CR-INJ-01

WORKSHOP INSTALLATION JOB SHEET & SOP

CONTINENTAL A2710700501CONTINENTAL A2710700501 High Pressure Fuel Pump Mercedes-Benz C250 SLK250 E250 1.8L Turbo W204 W212 M271 EVO 5WK97000 · Euro 56

Technician / Installer:

Date / Odometer:

Vehicle Reg / VIN:

Quality Sign-off:

CRITICAL INSTALLATION SPECIFICATIONS & TORQUES

Torques (Hold-down):10 N·m

Torques (Tightening):25 N·m

Copper washer:Renew the sealing washer on every installation. 1.50 mm standard; step up to 1.70 mm after light seat reaming, 2.00 mm after heavy seat refinishing.

IMA / ECU coding:Not required for this assembly

MANDATORY INSTALLATION CHECKLIST

[ ]Bore cleaned to bare metal using nylon/brass reaming brush & vacuumed (zero debris / no steel wire)
[ ]New copper sealing washer fitted with correct thickness (do not reuse old washer)
[ ]High-temperature ceramic paste applied to injector body shaft (never coat the nozzle tip)
[ ]Hold-down clamp bolt tightened in stage torque/angle sequence as specified
[ ]Fuel rail high-pressure line union torqued without tension or cross-threading
[ ]IMA / QR calibration code entered into diagnostic tool (Lexia/KTS/VCDS) for cylinder balancing
[ ]Low-pressure air bleed performed, engine idling leak-off test verified leak-free

CONTINENTAL

A2710700501

View Specs

SolenoidMercedes-Benz CGI Stratified/Homogeneous Direct Injection (140-bar System)Euro 56

CONTINENTAL A2710700501 High Pressure Fuel Pump Mercedes-Benz C250 SLK250 E250 1.8L Turbo W204 W212 M271 EVO 5WK97000

Reference data for Bosch A2710700501 common rail injector · OEM A2710700401, 2710700501, 2710700401, 5WK97000 · Application Mercedes-Benz M271 EVO (1.8L CGI Turbo M271.820 / M271.860)

Engine Platform:Mercedes-Benz M271 EVO (1.8L CGI Turbo M271.820 / M271.860) →

OE REFERENCEA2710700401, 2710700501, 2710700401, 5WK97000

CONTROL VALVEIntegrated Pulse-Width Modulated Quantity Control Solenoid

NOZZLE-

RAIL PRESSURE140 bar

EMISSIONEuro 5 / Euro 6 / LEV II

WARRANTY12 Months

Compatible Injectors

OEM Ref

Vehicle & Engine Fitment

Vehicle	Engine	Years
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

Technical Specifications

Specification	Value
System Type	Mercedes-Benz CGI 140-bar High-Pressure Direct Injection System
Operating PressureCore Spec
Drive Interface	Exhaust Camshaft Driven Multi-Lobe Mechanical Plunger Interface
Mounting Bolt Torque	10 N·m (89 in-lb) Torx E10 fasteners
High-Pressure Line Flare Nut	25 N·m (18 lb-ft) steel fuel delivery line union
Internal Seal Architecture	Multi-Lip Reinforced Fuel Plunger Barrier Diaphragm
Manufacturer	Continental Automotive (Tier-1 OEM for Mercedes-Benz AG)
Continental Production Number	5WK97000

Installation Tips

Tips & Warnings:

Inspect engine oil immediately for fuel dilution: Internal diaphragm leakage allows unburnt gasoline into the cylinder head, diluting oil, raising dipstick level, and ruining rod bearings.
Always change engine oil and filter: If fuel odor is detected on the dipstick or P0087 was stored, perform an immediate complete engine oil and filter service.
Counter-hold pump outlet fitting: Never torque high-pressure flare line without securing the pump housing fitting with a counter-holding wrench.
Prime fuel circuit prior to ignition: Switch ignition ON for 10 seconds without starting to prime low-pressure feed and purge air pockets from the pump.

Diagnostic Trouble Codes & Fault Protocols

Common diagnostic trouble codes (DTCs) triggered when this common rail injector experiences wear, circuit faults, or calibration drift:

P0087Critical

Fuel Rail / System Pressure Too Low

Excessive internal backleak from worn control valve seats drops common rail pressure below target under engine load.

P0087 Guide →🧪 Backleak Calculator

P0201 - P0208High

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.

P0201 Circuit Guide →

P0300 / P0301+High

Cylinder Misfire & Balancing Deviation

Carbon-clogged nozzle spray holes or missing IMA calibration causes uneven cylinder contribution. Recode ECM and verify washer seating.

P0300 Misfire Protocol →💻 IMA Coding Tool 📐 Washer Thickness

P0088High

Fuel Rail / System Pressure Too High

Spill line backpressure or stuck metering valve prevents rail depressurization, creating overpressure risks under load.

P0088 Guide →📊 Rail Pressure Converter

Browse all 61 Diesel Diagnostic Trouble Codes in our Workshop Hub ->

WORKSHOP PROTOCOLS

Technical Diagnostic & Service Protocols

Authoritative field procedures, diagnostic testing thresholds, and service SOPs for this assembly.

COMMON RAIL WORKSHOP DIAGNOSTICS

Common Rail High-Pressure Pump Diagnostics Guide

Diagnose common rail high-pressure pump failure: suction vacuum, CP4 roller glitter, plunger wear, air ingress & P0087 hard start. Workshop bench testing.

Read Technical Protocol

COMMON RAIL WORKSHOP DIAGNOSTICS

Fuel Metering Valve (IMV/SCV) Diagnostics Guide

Diagnostic guide for common rail fuel metering valves (IMV/SCV/FCA/MPROP). Normally open vs closed, coil resistance, PWM duty cycle & P0088 / P0089 test.

Read Technical Protocol

OBD-II DIAGNOSTIC PROTOCOL

P0087 Low Rail Pressure Diagnosis Guide

Step-by-step workshop diagnostic protocol for OBD-II DTC P0087 (Fuel Rail Pressure Too Low). 5-stage troubleshooting tree: backleak testing, SCV valve, PRV valve, and high-pressure pump.

Read Technical Protocol

COMMON RAIL WORKSHOP DIAGNOSTICS

Rail Pressure Relief Valve Diagnostics Guide

Common rail pressure relief valve (PRV) testing guide. Diagnose hot start stalls, P0087 rail pressure loss, return line leakage & single vs 2-stage valves.

Read Technical Protocol