Product Overview
The Engine Coolant Outlet, which also serves as the Fuel Filter Housing, is a critical component of the Mercedes-Benz OM651 2.1L CDI diesel engine. This dual-purpose unit serves as the mounting point for the fuel filter while also housing coolant passages that warm the diesel fuel for optimal combustion efficiency.
This genuine Mercedes-Benz part, 6512006000, integrates several functions into one precision-engineered component:
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Fuel filter mounting and housing – Secures the fuel filter in position
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Coolant circulation passages – Pre-heats fuel for better cold-start performance and reduced emissions
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Connection interface – Links coolant lines between the engine block and heating system
Key Features
| Feature | Benefit |
|---|---|
| 100% Genuine Mercedes-Benz OEM | Guaranteed fit, quality, and performance matching your vehicle’s original specifications -2 |
| Integrated Design | Combines fuel filtration and coolant circulation in one compact unit |
| Precision-Engineered for OM651 | Specifically designed for the 2.1L CDI diesel engine family |
| Temperature Management | Pre-heats fuel for improved cold-weather operation and fuel efficiency |
| Direct Replacement | Factory-spec component with all necessary mounting points |
Known Issue: OM651 Fuel Filter Housing Failure
The OM651 diesel engine is widely recognized in the Mercedes-Benz community for a specific weak point: the original plastic fuel filter housing is prone to cracking and leaking coolant.
Common symptoms of failure include:
| Symptom | Description |
|---|---|
| Coolant Loss | Unexplained drop in coolant level without external leaks elsewhere |
| Visible Coolant Leak | Coolant pooling in the recesses of the fuel filter housing or on the left side of the engine |
| “Top Up Coolant” Warning | Dashboard warning light activates due to low coolant |
| Coolant Puddles After Driving | Leakage often worsens when the engine reaches operating temperature |
According to Mercedes-Benz forum discussions, there are “only two types of original fuel filter housings on that engine: those that are leaking or those that are about to leak. The plastic edge at the bottom of the O ring is very weak, and that is where they leak.”
A modified version of this housing is available (such as this genuine 6512006000 replacement) that addresses the design flaw of earlier iterations.
🔧 Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 6512006000 / A 651 200 60 00 |
| Material | High-strength engineered plastic with metal inserts |
| Weight | Approximately 0.315 kg (Febi aftermarket equivalent) |
| Condition | New, Genuine OEM |
| Supplementary Items | Includes necessary bolts/screws and holder (on some versions) |
🔄 OEM Cross-Reference Numbers
This genuine Mercedes-Benz part replaces and supersedes the following OEM numbers -1-5:
- 651 200 60 00 (original), A6512006000, 6512003700, A6512003700, 6512003900, A6512003900, 6512000356, A6512000356, 6512000456, A6512000456, 6512001056, A6512001056
🚗 Vehicle Compatibility
This part is compatible with a wide range of Mercedes-Benz vehicles equipped with the OM651 2.1L CDI diesel engine (4-cylinder, 2143cc).
| Model Series | Years | Notes |
|---|---|---|
| C-Class (W204, S204, C204) | 2007–2014 | C200 CDI, C220 CDI, C250 CDI |
| E-Class (W212, S212, C207) | 2009–2016 | E200 CDI, E220 CDI, E250 CDI |
| GLK-Class (X204) | 2008–2015 | GLK200 CDI, GLK220 CDI, GLK250 CDI |
| ML-Class (W166) | 2011–2015 | ML250 Bluetec 4Matic |
| GLE-Class (W166) | 2015–2018 | GLE300d 4Matic |
| Sprinter (W906, W907) | 2006–present | Sprinter 2500, 3500 with 2.1L diesel |
| S-Class (W221, W222) | Selected variants | Limited applications |
| CLS-Class (C218, X218) | 2011–2017 | CLS250 CDI |
| Vito / V-Class (W639, W447) | 2010–present | Various applications |
Note: This is a representative list. For exact fitment confirmation, please contact us with your Vehicle Identification Number (VIN).
Why Choose Jemerto Motors for Your Mercedes-Benz Parts?
At Jemerto Motors, we specialize in genuine OEM parts for Mercedes-Benz, Toyota, and Jeep vehicles. When you purchase from us, you receive:
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✅ 100% Genuine Mercedes-Benz Parts – No aftermarket imitations
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✅ Competitive Pricing – Fair, transparent rates
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✅ Expert Support – Our team understands Mercedes-Benz diesel engines
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✅ Fast Shipping – Quick processing and reliable delivery
📦 Order Your Genuine Mercedes-Benz Coolant Outlet / Fuel Filter Housing Today
If you own a Mercedes-Benz with the OM651 2.1L CDI diesel engine and suspect a coolant leak, this genuine replacement housing is the permanent solution to a known design weakness. Don’t wait for a small leak to become a roadside breakdown.
Order your 6512006000 genuine Mercedes-Benz part today.
📞 Need assistance with fitment? Contact us with your VIN for exact compatibility verification.
Jemerto Motors – Your Trusted Source for Genuine Mercedes-Benz, Toyota, and Jeep Parts
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