Mercedes-Benz CL600 V12 Engine Camshaft Position Sensor Guide (2007-2014)
Resolving stalling, rough idle, and starting issues in your 2007-2014 CL600 begins with this critical sensor.
- Your CL600's M275 V12 engine likely has only one camshaft position sensor, simplifying the repair.
- Symptoms include stalling, no-start conditions, and a check engine light with codes P0340 or P0341.
- For this high-performance engine, it is strongly recommended to use an OEM-supplier brand like Bosch to ensure reliability.
- DIY replacement is feasible for many owners and can be completed in under an hour with basic tools.
Is Your CL600 Stalling or Hard to Start?
A failing camshaft position sensor is a common issue that can cause significant drivability problems in the 2007-2014 Mercedes-Benz CL600. Because this sensor is critical for engine timing, a bad signal can make your powerful V12 engine run poorly or not at all. Symptoms often start small but can quickly escalate, potentially leaving you stranded. Recognizing the signs and understanding your replacement options is key to keeping your vehicle on the road.
Symptoms of a Failing Camshaft Position Sensor
- Check Engine Light: This is often the first and most obvious sign. The ECU will store error codes like P0340 or P0341.
- Engine Stalling: The engine may stall unexpectedly, either while driving or at an idle, which can be dangerous.
- Hard Starting or No Start: The car may crank for a long time before starting, or it may refuse to start at all. This problem often gets worse over time.
- Rough Idle and Misfires: You may feel vibrations or shaking when the car is stopped because the engine timing is off.
- Poor Acceleration: The car may feel sluggish, hesitate, or lack power when you press the gas pedal.
- Reduced Fuel Economy: Inefficient engine timing caused by a bad sensor can lead to burning more fuel than necessary.
How Many Sensors Does the CL600 V12 Have?
While many V-engines have multiple camshaft sensors, owner forums for the M275 V12 engine used in the 2007-2014 CL600 indicate it has only one camshaft position sensor. It is located on the passenger side (right-hand bank) of the engine. This simplifies diagnosis and replacement, as you only need to worry about one sensor.
Choosing the Right Aftermarket Sensor for Your CL600
For a high-performance, complex engine like the M275, the quality of electronic sensors is critical. While saving money is tempting, a cheap, low-quality sensor can fail prematurely or provide inaccurate signals, leading to persistent performance issues. Here’s a breakdown of aftermarket brand tiers to help you choose wisely.
Tier 1: OEM Supplier Brands
These brands manufacture parts for Mercedes-Benz directly. They offer the same quality as the dealer part, often without the high price tag. For your CL600, this is the most recommended path.
- Bosch: As a primary OEM supplier for Mercedes-Benz electronics, a Bosch sensor is often identical to the genuine part. This is the safest and most reliable aftermarket choice.
Tier 2: Quality Aftermarket Brands
These brands have a strong reputation for producing reliable parts that meet or exceed OEM specifications. They are a solid choice if an OEM supplier brand is not available.
- Hella: Another German brand with a strong reputation for quality electronics.
- Delphi: A well-respected global parts manufacturer with a history of producing reliable sensors.
- Standard Ignition (Standard Motor Products): A long-standing brand known for quality engine management components.
A Word of Caution on Budget Brands
Brands like Dorman, Facet, Spectra, and other lower-priced options are available. While they offer an attractive price, their reliability on a sensitive European engine can be questionable. Using a budget sensor might solve the problem temporarily, but it could also fail quickly or cause subtle performance issues that are hard to diagnose. For a vehicle like the CL600, investing in a quality sensor from Tier 1 or Tier 2 is strongly advised.
Cost of Replacing the Camshaft Position Sensor
| Part or Service | Estimated Cost |
|---|---|
| New OEM (Dealer) Part | $80 - $150 |
| New Aftermarket Part | $22.69 - $96.16 |
| Shop Labor | $70 - $150 |
| Total Professional Replacement | $100 - $300 |
Costs are estimates and may vary based on your location and the specific repair shop.
Frequently Asked Questions (FAQ)
Is replacing the camshaft sensor a good DIY job?
Yes, for many owners. The sensor is located on the passenger side of the engine and is typically held by a single E8 Torx bolt. The process involves removing the engine cover for access, unplugging the electrical connector, removing the bolt, and swapping the sensor. The tight space can be a challenge, but it does not require specialized tools beyond a basic socket set with Torx bits. Estimated time is under one hour.
What do the codes P0340 and P0341 mean?
Code P0340 indicates a general malfunction in the camshaft position sensor circuit. This means the ECU has lost the signal completely. Code P0341 means the signal from the sensor is out of the expected range or performance, suggesting it's sending erratic or incorrect data. Both codes point to a problem with the sensor or its wiring and require inspection.
Do I need to replace anything else with the sensor?
The new sensor will come with a new O-ring. It is critical to make sure the old O-ring is removed from the engine before installing the new sensor to prevent oil leaks. It's also a good idea to inspect the electrical connector for any corrosion or damage.
Are there any recalls for this part on my CL600?
No. As of early 2026, there are no specific recalls or Technical Service Bulletins (TSBs) from Mercedes-Benz or the NHTSA for the camshaft position sensor on the 2007-2014 CL600. Any issues with this part are considered standard wear and tear.
Technical Specifications
OEM Part Numbers: 2729050043
This is a 3-pin Hall effect sensor that reads the camshaft's position. The M275 engine in the 2007-2014 CL600 appears to use only one sensor, located on the passenger-side cylinder head.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Mercedes-Benz CL600:
- 🛍️ Shop This Part
- Is Your CL600 Stalling or Hard to Start?
- Symptoms of a Failing Camshaft Position Sensor
- How Many Sensors Does the CL600 V12 Have?
- Choosing the Right Aftermarket Sensor for Your CL600
- Tier 1: OEM Supplier Brands
- Tier 2: Quality Aftermarket Brands
- A Word of Caution on Budget Brands
- Cost of Replacing the Camshaft Position Sensor
- Frequently Asked Questions (FAQ)
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