Mercedes M272 A2720505347 Camshaft Phaser for C350 E350 ML350
Mechanics working on Mercedes C350, E350, ML350 or CLK350 often see the Mercedes M272 Camshaft Adjuster fail after 80,000–150,000 km, especially when oil changes have been irregular or the wrong viscosity oil has been used. The A2720505347 Camshaft Phaser restores proper valve timing, reduces rattle on cold start and helps clear persistent timing-related fault codes.
The unit is manufactured to OEM dimensional tolerances and tested for correct vane movement and solenoid response before leaving the factory. It replaces OE numbers A2720505347, A2720504447, A2720502447 and several others that cross-reference to the same right intake position.
Mercedes 3.5 V6 M272 Camshaft Adjuster units like this one control intake valve opening duration according to engine load and rpm. When the phaser sticks or leaks internally, the engine may exhibit rough idle, reduced power above 3000 rpm or illuminated check-engine lights. Fitting the correct replacement returns the timing control to factory calibration.
Technical Specifications
| Specification | Details |
|---|---|
| Product Name | A2720505347 Camshaft Phaser |
| OE Part Numbers | A2720505347, A2720502447, A2720504447, A2720504647, A2720502347 |
| Engine Platform | Mercedes-Benz M272 (V6) |
| Engine Displacement | 3.0 L / 3.5 L |
| Warranty | 12 months or 12,000 miles from the date of Ex-factory |
| Packing | Neutral Packing or Customer Required |
| MOQ | 6 pcs |
| Place for Origin | Ningbo City of China |
| Brand | Wellgine |
Performance Indicators & Diagnostic Considerations
Variable timing systems like the Mercedes 272 Camshaft Phaser are subject to internal wear, oil contamination or component fatigue over service life. In automotive diagnostics, malfunctioning or degraded camshaft phasers can lead to timing discrepancies that trigger fault codes and performance symptoms. Common indication patterns include:
- Engine control unit entering diagnostic trouble codes (e.g., timing correlation or cam‑related codes)
- Rough idle or unstable low‑speed operation
- Noticeable hesitation or uneven throttle response
These behaviors typically reflect the phaser’s inability to maintain commanded timing positions due to wear or hydraulic response limitations. Professional diagnosis often entails correlating scan tool data with mechanical inspection to isolate the VVT adjuster’s effect on intake timing control.
Manifestation of Camshaft Phaser Issues
When a Mercedes M272 Camshaft Adjuster becomes compromised, several phenomena may be observed in real‑world operation:
- Rough idle and brief instability during warm‑up
- Intermittent vibration or noise around the timing cover area
- Diagnostic codes related to crankshaft‑camshaft correlation
These symptoms emerge from timing inconsistencies that affect valve lift phasing and combustion stability, especially at idle or transition RPM ranges. Technical discussions on forums and field reports describe intermittent cam position variation and related error codes as common indicators of VVT phaser wear.
Recommended Practices for Part Selection
For professional workshops, parts distributors and engine rebuild specialists, selecting a Right Intake Camshaft Adjuster A2720505347 that aligns with original engineering tolerances is essential. OEM alternatives and thoroughly tested aftermarket units with documented compatibility should be considered to maintain engine timing precision and reduce repeat service events.
Ensure fitment validation against the vehicle’s engine code and existing OE numbering before installation.
FAQ
1. What does the A2720505347 Camshaft Phaser do on M272 engines?
The A2720505347 Camshaft Phaser controls intake cam timing within the variable valve timing system on Mercedes M272 3.5 V6 engines. It adjusts camshaft phase based on oil pressure and ECU input to optimise valve timing across operating conditions.
2. Which Mercedes models commonly use the Mercedes 3.5 V6 M272 Camshaft Adjuster?
This adjuster fits a variety of Mercedes‑Benz models equipped with the M272 V6, including C350, E350, CLK350, ML350 and similar petrol engines. Equivalent part references are recognised under OE number A2720505347.
3. What are typical symptoms of a failing Mercedes 272 Camshaft Phaser?
Failure modes often produce rough idle or unstable running, intermittent hesitation, and timing related fault codes. Correlation faults between crankshaft and camshaft timing (e.g., P0016) can be traced back to imprecise timing caused by phaser malfunction or related timing system wear.
4. Can fault code P0016 indicate the camshaft adjuster is worn?
Yes, P0016 indicates a discrepancy between crankshaft and intake camshaft position. While sensor, chain, or oil control issues may contribute, a degraded camshaft phaser often results in these timing correlation faults.
5. Does the Right Intake Camshaft Adjuster A2720505347 interchange with other references?
Yes, aftermarket alternatives match the same Mercedes OE number; multiple brands supply compatible units referencing the same OE spec, suitable for intake side fitments.
6. How essential is OEM match when replacing the Mercedes M272 Camshaft Adjuster?
Matching the OE number A2720505347 ensures the phaser’s profile and hydraulic control are consistent with the original engineering specification, which is critical for precision timing control.
7. Can a worn camshaft phaser cause increased fuel consumption?
Timing discrepancies linked to incorrect phasing can alter combustion efficiency, which may result in less optimal fuel delivery and higher consumption, depending on operating conditions and control strategy.
8. Should other timing components be inspected when replacing a camshaft adjuster?
Yes, tensioners, timing chains and solenoids that control phaser actuation should be evaluated concurrently to ensure the VVT system functions correctly after the A2720505347 Camshaft Phaser installation.