Genuine Specification Clean Air Line with Integrated Air Mass Sensor – OM642 V6 Diesel

 

Specification Overview

Genuine Mercedes-Benz specification Clean Air Line with integrated Air Mass Sensor for the OM642 V6 diesel engine family. This is a complete assembly that combines the intake duct (often called the “Clean Air Line” or “bat-wing”) with two integrated Mass Air Flow (MAF) sensor elements.

Unlike many engines with a single, easy-to-replace MAF sensor, the OM642 integrates two separate MAF sensor elements into a large, single plastic Y-pipe assembly. The air mass sensor is a key element of the intake system that significantly impacts engine performance by precisely measuring airflow, allowing for optimal engine operation, improved performance, and lower fuel consumption.

• Type: Complete Clean Air Line with Integrated MAF Sensor

• Engine: OM642 V6 CDI / BlueTEC Turbo Diesel

• Configuration: Y-pipe assembly with dual MAF sensor elements

• Packaged Dimensions (L x W x H): 61.0 x 27.0 x 22.0 cm

• Condition: New / Exchange (variant dependent)

• OEM Sensor Manufacturer: Bosch

⚠️ Critical Note: The OM642 uses a dual MAF sensor design integrated into a single Y-pipe assembly. Failure of either sensor typically requires replacement of the entire Clean Air Line assembly. The OEM sensor for the OM642 is manufactured by Bosch. Aftermarket sensors with incorrect calibration curves may trigger fault codes immediately.

---

Application & Engine Fitment

This Clean Air Line assembly is designed exclusively for the OM642 series 3.0L V6 CDI / BlueTEC diesel engine.

Primary Engine Applications:

---

Comprehensive Model Fitment (2007–2013):

Compatibility Notes (eBay Fitment Data):

⚠️ Important: This assembly is compatible with vehicles that have factory-installed part numbers A6420908237 / A6420906037 / A6420907437 / A6420943497 / A6420946397 / A6420907337. Always verify the exact part number by VIN (17-digit chassis number) before ordering.

---

Service Life & Change Intervals (Technical Data)

Standard Recommended Interval:

• 80,000 – 120,000 km under normal driving conditions

• Replacement is typically required when the MAF sensor fails or becomes contaminated

Critical Adjustment for Kampala (Severe Operating Conditions):
The operational climate (ambient temperatures 20°C–40°C), high humidity, stop-and-go urban traffic, and high dust loads classify as “Severe Duty” per MB Work Instructions. Under these conditions, MAF sensor contamination and failure accelerate significantly.

Recommended Replacement Interval under East African operating parameters:

• Maximum: 60,000 – 80,000 km

• Heavy urban use / dusty conditions: 50,000 km recommended

• Inspect and clean the MAF sensor elements regularly if experiencing rough idle or reduced power

Failure Symptoms – When to Replace:

• Diagnostic Trouble Code (DTC) P1101 – MAF Sensor system fault

• Check Engine Light illuminated

• Reduced engine power or hesitation during acceleration

• Rough idle or unstable engine operation

• Increased fuel consumption

• Black smoke from exhaust (over-fuelling due to incorrect air measurement)

• Engine stalling or difficulty starting

⚠️ Important: P1101 on the OM642 almost always points to a failure of the dual MAF sensor assembly or an air leak at the turbo inlet. The code often sets with the key on, engine off. Replacing the entire Clean Air Line assembly is the recommended fix.

Cleaning vs. Replacement:
Cleaning the MAF sensors has a 50–60% success rate in resolving issues caused by pure contamination. If cleaning does not resolve the fault, replacement with a genuine Mercedes-Benz sensor (Bosch) is required.

---

Packaging & Pricing (Alps Autoz Kampala)

Complete Service Recommendation:
When replacing the Clean Air Line, inspect the following components simultaneously:

• Engine air filters (both left and right – OM642 uses two air filters)

• Turbo inlet seals / O-rings

• Intake system for vacuum leaks

• Airbox seals

---

Technical Notes for the Workshop

• Installation: The Clean Air Line is located on top of the engine. Installation is straightforward and includes new clamps. After installation, the MAF sensors may need to be adapted using a diagnostic tester, and the engine control fault code must be cleared.

• Dual Sensor Design: The OM642 Clean Air Line integrates two MAF sensors into a single plastic Y-pipe assembly. Both sensors must be functional for proper engine operation.

• OEM Supplier: The genuine MAF sensor for the OM642 is manufactured by Bosch.

• Cleaning: While MAF sensor cleaner spray exists, the OM642’s integrated design makes cleaning individual sensors difficult. Replacement of the complete assembly is the recommended solution.

• Genuine vs. Aftermarket: This is a genuine Mercedes-Benz OEM part. Aftermarket sensors with incorrect calibration curves may trigger P1100/P1101 faults immediately.

• Core Charge: Some suppliers may charge a core deposit for exchange units. The core charge is refundable upon return of the old unit.

• Storage: Store in a dry environment away from direct sunlight.

---

Alps Autoz – Kampala