Engine Camshaft Position Sensor Guide for the 2003-2006 Mercedes-Benz E500
Solve stalling, rough idle, and starting issues on your W211 E500 with the M113 V8 engine.
- The correct model years for the E500 with the M113 V8 engine are 2003-2006.
- Bosch is the original equipment manufacturer (OEM); choosing Bosch, Hella, or Bremi is a safe bet for quality.
- Replacement is extremely easy for a DIYer, requiring only an E8 Torx socket and about 15 minutes.
- When replacing, check the old sensor's connector for oil, as leaks can damage the main engine computer.
Is Your E500 Stalling or Hard to Start? It Could Be the Camshaft Sensor.
If you own a 2003-2006 Mercedes-Benz E500, you have a robust vehicle, but like any car, it has components that wear out. The camshaft position sensor is a common failure point that can cause frustrating and seemingly random engine problems. Symptoms often get worse as the engine warms up. Fortunately, this is one of the easiest and most affordable DIY repairs you can perform on your M113 V8 engine.
Symptoms of a Failing Camshaft Position Sensor
A bad camshaft position sensor sends incorrect data—or no data at all—to the engine computer. This can make your E500 run poorly. Look for these common signs:
- Check Engine Light: This is often the first warning. A code scanner will likely show codes like P0340 or P0341. 🎬 Learn how to diagnose and fix a P0341 circuit code.
- Hard Starting: The engine cranks for a long time before it finally starts, especially when it's already warm.
- Engine Stalling: The engine may shut off unexpectedly while idling at a stoplight or even while driving at low speeds.
- Rough Idle: Your car may vibrate or shake more than usual when it's in Park or stopped in Drive.
- Poor Acceleration: You might feel hesitation or a lack of power when you press the gas pedal.
A Critical Note on Oil Leaks
A known issue on many Mercedes engines, including the M113, is oil leaking through the camshaft position sensor's electrical connector. This oil can travel up the wiring harness and reach the main engine computer (ECU), causing thousands of dollars in damage. When replacing your sensor, inspect the connector for any signs of oil. Using a high-quality replacement sensor is the best defense against this problem.
Choosing the Right Aftermarket Sensor
You don't have to buy a part from the Mercedes dealer to fix your car. However, with critical electronic sensors, quality matters. The market is divided into a few tiers.
Tier 1: OEM & Premium Aftermarket
These brands are known to be original equipment suppliers for Mercedes-Benz or have a reputation for equivalent quality. They are the safest bet for a long-lasting, reliable repair.
- Bosch: Widely known as the Original Equipment Manufacturer (OEM) for this specific part. Choosing Bosch is essentially the same as buying the part from a Mercedes dealer, but without the dealer markup.
- Hella, Bremi, Delphi: These are respected German or European brands that manufacture high-quality electronic components. They are excellent alternatives to Bosch and are trusted in the European car community.
Tier 2: Reputable Aftermarket Brands
These brands offer a balance between cost and quality. They are generally reliable and a good choice for a budget-conscious repair.
- Standard Ignition (Standard Motor Products), Walker Products: These are large, established companies that produce a wide range of reliable aftermarket parts.
- Dorman: Dorman offers direct-fit replacement parts that are widely available. While some mechanics are wary of budget electronics, many DIYers use Dorman parts successfully. They often come with a lifetime warranty.
Tier 3: Price-Focused Brands
This category includes many lesser-known brands found on online marketplaces. While the low price is tempting, the quality can be inconsistent. A premature failure means you'll be doing the job again. For a critical sensor that can cause stalling, it's often wise to invest a few extra dollars for a part from a higher tier.
Pro Tip: Check the O-Ring
The camshaft position sensor is sealed against the engine with a small rubber O-ring. A new, high-quality sensor will come with a new O-ring. Always make sure the old O-ring is removed from the engine before installing the new sensor to prevent oil leaks.
🎬 See how to properly seat the new O-ring during installation.Cost of Replacing the E500 Camshaft Position Sensor
This is an inexpensive repair, especially if you do it yourself. The part itself is affordable, and the labor is minimal.
| Part or Service | Estimated Cost |
|---|---|
| New Aftermarket Sensor | $17 - $96 |
| New OEM Sensor (Dealer) | $80 - $150 |
| Shop Labor Cost | $75 - $125 |
| DIY Total Cost | $17 - $96 |
| Shop Replacement Total Cost | $155 - $275 |
Frequently Asked Questions (FAQ)
Where is the camshaft position sensor located on the E500?
The sensor is located on the front of the engine on the passenger's side (right side). It's mounted to the cylinder head, just below the valve cover, and is held in by a single bolt.
Is this a difficult repair to do myself?
No, this is a very easy DIY job. It requires basic tools and takes about 15 minutes. 🎬 Watch this step-by-step walkthrough of the E500 sensor replacement. The sensor is easy to access. You will need an E8 external Torx socket to remove the single bolt holding it in place.
Are there any recalls for this part?
No. While there are recalls for the 2003-2006 E500, they are for other issues like the sunroof panel. There are no official recalls or Technical Service Bulletins (TSBs) from Mercedes-Benz for the camshaft position sensor on this model.
Should I replace the crankshaft position sensor at the same time?
It's not required, but the crankshaft and camshaft sensors are the two most common sensors to fail and cause no-start or stalling issues on the M113 engine. The crankshaft sensor is more difficult to replace. If your car has high mileage (over 100,000 miles), some owners replace both as preventative maintenance.
Helpful Videos
Technical Specifications
OEM Part Numbers: 272-905-00-43 004-153-96-28 004-153-69-28
The M113 V8 engine in the 2003-2006 E500 uses a single, 3-pin, Hall-effect camshaft position sensor. It is secured by one E8 external Torx bolt.
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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 E500:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your E500 Stalling or Hard to Start? It Could Be the Camshaft Sensor.
- Symptoms of a Failing Camshaft Position Sensor
- A Critical Note on Oil Leaks
- Choosing the Right Aftermarket Sensor
- Tier 1: OEM & Premium Aftermarket
- Tier 2: Reputable Aftermarket Brands
- Tier 3: Price-Focused Brands
- Pro Tip: Check the O-Ring
- Cost of Replacing the E500 Camshaft Position Sensor
- Frequently Asked Questions (FAQ)
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