Your cart is empty
0
items
Subtotal:$0.00
:
from
to
Clear
Clear
 |  | |
Genuine OEM 0445457928 - Diesel Glow Plug Connector
Product Overview
The Genuine OEM 0445457928 diesel glow plug connector is a factory-specification electrical component designed for Mercedes-Benz diesel vehicles equipped with 3.0L V6 turbocharged diesel engines. This connector interfaces the glow plug control circuit with the engine block, enabling reliable cold-start ignition in diesel powerplants. It fits X164 GL-Class (GL320 CDI, GL350 BlueTEC), W164 M-Class (ML320 CDI, ML350 BlueTEC), and W251 R-Class (R320 CDI) models from 2007 to 2012. As a Genuine Mercedes-Benz component, this connector meets factory durability and electrical specifications and is the same part supplied to dealerships for warranty service.
This is a single connector. Most diesel glow plug systems use one connector per engine block, but verify your vehicle configuration before ordering.
Symptoms of a Failing Diesel Glow Plug Connector
- Difficulty starting in cold weather, especially below 40°F
- Extended cranking time before ignition
- Rough idle immediately after a cold start
- Glow plug warning light illuminated on the dashboard
- Visible corrosion or discoloration at the connector terminals
- Loose or intermittent electrical connection at the glow plug assembly
Cross Reference Numbers
This Genuine OEM 0445457928 connector is equivalent to or replaces the following part number: 044-545-79-28.
Vehicle Compatibility
This connector fits the popular models below. For Fitment Confidence, please use the vehicle selector tool above to verify exact compatibility for your vehicle.
- Mercedes-Benz GL320 CDI 3.0 V6 Diesel (X164): 2007–2008
- Mercedes-Benz GL350 BlueTEC 4MATIC 3.0 V6 Diesel (X164): 2010–2012
- Mercedes-Benz ML320 CDI 3.0 V6 Diesel (W164): 2007–2008
- Mercedes-Benz ML350 BlueTEC 4MATIC 3.0 V6 Diesel (W164): 2011–2012
- Mercedes-Benz R320 CDI 3.0 V6 Diesel (W251): 2007–2008
- Mercedes-Benz E350 BlueTEC 3.0 V6 Diesel (W212): 2011–2012
This connector may also fit other diesel applications. Please use the vehicle selector tool to verify compatibility before purchase.
Often Replaced Together
For a complete glow plug system service, consider replacing these components at the same time:
- Diesel glow plugs (full set of four or five, depending on engine configuration)
- Glow plug control module or relay
- Engine block wiring harness (if corrosion is evident)
- Diesel fuel filter and water separator
Why Shop at eEuroparts.com?
- Proven Expertise: Over 25 years of experience with European vehicles means we know your car inside and out.
- Fitment Confidence: Our accurate cataloging ensures you get the right part the first time, backed by our fitment guarantee.
- Fast, Reliable Shipping: Most in-stock orders ship the same or next business day from our U.S.-based warehouse.
- Transparent Pricing: Competitive prices with no hidden fees or surprise charges.
- Exclusive Kits That Fitâ„¢: Complete repair solutions with no guesswork.
- Established Trust: Serving the European car community since 2000.
Frequently Asked Questions
How do I know if my Mercedes-Benz diesel glow plug connector needs replacement?
A failing connector typically manifests as difficulty starting the engine in cold weather, even after the glow plug system has cycled. If you notice the glow plug warning light staying on longer than normal, or if the engine cranks excessively before firing, the connector may have a loose or corroded terminal. Visually inspect the connector at the engine block for white or green corrosion, burn marks, or visible cracks in the plastic housing.
What is the difference between this connector and the glow plugs themselves?
The glow plug connector is the electrical interface that carries current from the control module to the glow plug assembly. The glow plugs are the heating elements inside the cylinders. If your glow plugs are new but cold-starting is still difficult, the connector may be the culprit. Conversely, a bad connector will prevent any glow plug from functioning, even if the plugs themselves are good.
Why is this a Genuine OEM part important for my X164 GL350 BlueTEC or W164 ML350 BlueTEC?
Mercedes-Benz diesel engines rely on precise electrical timing and current delivery to the glow plugs. Genuine OEM connectors are engineered to exact specifications for voltage handling and environmental sealing. An aftermarket or incorrect connector may introduce resistance, corrosion, or poor contact, leading to starting problems and potential damage to the glow plug control module. Genuine parts also carry dealership warranty protection.
Can I replace just the connector, or do I need to replace the glow plugs too?
You can replace the connector independently if it is visibly corroded, cracked, or loose. However, if the glow plugs have high mileage (typically 80,000+ miles on diesel engines), it is often practical to replace them at the same time, since you will already have the system apart. Consult your service manual or a technician for the recommended glow plug replacement interval for your specific model year.
How long does it take to install this connector?
Installation typically takes 30 minutes to 1 hour for a DIY technician with basic tools. You will need a socket set, wrenches, and possibly a connector removal tool to safely disconnect the old connector without damaging the wiring harness. The glow plug assembly is located on or near the engine block and is accessible without removing major components. If corrosion is severe, penetrating oil and patience may be required.
Is this connector the same for all 3.0L V6 diesel Mercedes-Benz models?
This connector (0445457928) is designed for the OM642 3.0L V6 turbocharged diesel engine used in X164, W164, W212, and W251 platforms from 2007 to 2012. While the engine is the same across these models, always verify fitment with the vehicle selector tool, as wiring harness configurations and connector locations can vary slightly by model and year. Do not assume compatibility with other diesel engines or model generations.
Order Genuine OEM 0445457928 today. In-stock orders ship same or next business day from our U.S. warehouse, and our fitment team is one call away if you need help confirming the right connector for your Mercedes-Benz diesel.
Note: All information on this page and in the FAQ is for general reference only. Verify fitment and consult a professional as needed. eEuroparts.com is not responsible for incorrect part selection or installation.
- BrandGenuine OEM
- ManufacturerGenuine OEM
- MPN0445457928
- Part TypeDiesel Glow Plug Connector
- OE Part Numbers044-545-79-28, 0445457928
- Fitment
- Fitment TypeVehicle Specific
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 2008 | Mercedes-Benz | GL320 | CDI (3.0 V6 DIESEL) | |
| 2008 | Mercedes-Benz | ML320 | CDI (3.0 V6 DIESEL) | |
| 2008 | Mercedes-Benz | R320 | CDI (3.0 V6 DIESEL) | |
| 2010 | Mercedes-Benz | GL350 | Bluetec 4Matic (3.0 V6 DIESEL) | |
| 2011 | Mercedes-Benz | GL350 | Bluetec 4Matic (3.0 V6 DIESEL) | |
| 2011 | Mercedes-Benz | ML350 | Bluetec 4Matic (3.0 V6 DIESEL) | |
| 2011 | Mercedes-Benz | E350 | Bluetec (3.0 V6 DIESEL) | |
| 2007 | Mercedes-Benz | R320 | CDI (3.0 V6 DIESEL) | |
| 2007 | Mercedes-Benz | ML320 | CDI (3.0 V6 DIESEL) | |
| 2007 | Mercedes-Benz | GL320 | CDI (3.0 V6 DIESEL) | |
| 2012 | Mercedes-Benz | E350 | Bluetec (3.0 V6 DIESEL) | |
| 2012 | Mercedes-Benz | GL350 | Bluetec 4Matic (3.0 V6 DIESEL) | |
| 2012 | Mercedes-Benz | ML350 | Bluetec 4Matic (3.0 V6 DIESEL) |
Warranty Overview
At eEuroparts, we stand behind the quality of the products we sell. Every part we offer is backed by a warranty designed to give you peace of mind and protect your investment.
Standard Warranty – Most Parts
Coverage: 2 years or 24,000 miles (whichever comes first) from purchase date.
Protection: Defects in materials or workmanship under normal personal use.
Eligibility: Applies only to the original purchaser and the vehicle where the part was first installed.
Exclusions:
Wear-and-tear items (brake pads, filters, bulbs, wipers, etc.)
Commercial, fleet, rideshare, off-road, or racing use
Improper installation, misuse, accidents, or modifications
Not Covered: Labor, shipping, towing, or incidental costs.
Bison Performance Warranty – Our House Brand
Coverage: Limited Lifetime Warranty for as long as you own your vehicle.
Applies To: All products sold under the Bison Performance label.
Premium Protection: Goes beyond our standard warranty — if it’s a Bison product, the 2-year/24k mile limit is replaced with lifetime coverage.
Exclusions: Same as the standard warranty (normal wear, commercial use, improper installation, etc.).
What’s Included: Replacement of the defective product (labor and shipping excluded).
Warranty Claim Requirements
To keep claims fast and fair, we require:
Proof of purchase (invoice or order confirmation).
Photos or videos showing the defective part, order number, date, VIN, and odometer reading.
Diagnostic reports or part returns for non-visible issues may be requested.
Claims must be truthful, properly documented, and reflect normal consumer use.
Buy With Confidence: We back our products because we believe in their quality, with a transparent, customer-first warranty process you can trust. And with Bison Performance products, you’ll enjoy Limited Lifetime protection—an assurance few brands can match.
For full details and exclusions, please see our complete Warranty Terms & Conditions.
This summary is for convenience only. For full warranty coverage details, exclusions, and requirements, see our official Warranty Terms & Conditions. In case of conflict, the full policy governs.
Return Policy Overview
Most parts can be returned within 30 days of delivery if unused, uninstalled, and in original packaging.
To start a return, contact customer support via Chat or Contact Us.
Restocking fee: Up to 20% may apply for certain orders (buyer’s remorse, order errors, or special-order items)
Refunds: Issued to your original payment method within 3–5 business days after inspection
Exchanges: Not automatic — please return and reorder
Replacements: May be approved for incorrect or defective items reported within 7 days
Not returnable:
Used or installed parts
Electrical components
Opened filter kits, gaskets, or contaminated items
Final sale or custom orders
Important Notes:
Return shipping is your responsibility unless we made a verified error
Fitment is the customer’s responsibility (we can assist, but do not guarantee)
Country of origin may vary and is not grounds for return
For complete details, please see our full Return Policy.
This Returns summary is provided for convenience only. All returns, refunds, and exchanges are subject to the complete Returns Policy. In the event of any conflict, the full policy governs.
Fast, Reliable Shipping — Straight to Your Door
We ship most orders the same day when placed before 2 PM CST (Monday–Friday). Our main warehouse is just east of Nashville, TN, and we also ship from multiple locations nationwide to get your order to you as quickly as possible.
We use trusted carriers like UPS, FedEx, and USPS.
Tracking info is emailed to you as soon as your order ships.
Delivery estimates at checkout are based on carrier data, but not guaranteed.
Need help with a shipment?
If your order is missing, damaged, or incorrect, just let us know within 5 days of delivery. We’ll walk you through the quick claim process — including a few photos to help us make things right.
For complete details, please see our full Shipping Policy.
This Shipping summary is provided for convenience only. Delivery times, carrier terms, fees, restrictions, risk of loss, and other details are governed by our complete Shipping Policy. In the event of any conflict, the full policy governs.
