Keeping your Mercedes GL450’s cooling system in top shape is key to its health and performance.
A failing coolant line or a cracked reservoir can lead to big problems. You might notice leaks, overheating, or even engine damage if things go wrong.
We looked at the top replacement parts available right now. Finding the right fit for your specific model year is super important.
This guide will help you pick the best part for your repair job. Let’s find the right part to keep your GL450 running cool.
| Product Image | Product Name | Best For | Check Price |
|---|---|---|---|
 |
A-Premium Turbo Coolant Line | Left Side Turbo Repair | PRICES |
 |
YFANTPA Turbo Coolant Line | Direct OEM Replacement | PRICES |
 |
SYKRSS Coolant Reservoir | Complete Reservoir Swap | PRICES |
 |
Vphix Coolant Reservoir | W164 Series Models | PRICES |
 |
Psrorkeu Turbo Coolant Line | 4.7L Engine Models | PRICES |
 |
A-Premium Overflow Tank | Wide Model Compatibility | PRICES |
 |
Mercedes Washer Fluid | Winter Windshield Care | PRICES |
A-Premium Left Driver Side Turbocharger Coolant Line
This A-Premium coolant line fixes leaks on the left turbo for your GL450.
It fits 2013-2014 GL450 models perfectly. The build quality feels solid and it comes with all the needed gaskets. Installation is pretty simple if you have some mechanical skill.
I like that it’s a direct replacement for the OEM part. You won’t need to modify anything to make it fit right. The price is fair for what you get.
Pros:
👍 Perfect fit for specific GL450 years
👍 Comes with all installation gaskets
👍 Solid construction quality
👍 Direct OEM replacement
👍 Fair price point
Cons:
👎 Only for left side turbo
👎 Limited to 2013-2014 models
👎 Requires some mechanical knowledge
My Honest Opinion:
If your left turbo coolant line is leaking, this part solves the problem. It fits right and works well. Just make sure your model year matches before you buy.
YFANTPA Turbo Coolant Line
The YFANTPA line replaces common OEM numbers for many Mercedes models.
It works with GL450, GL550, and GLS550 from 2012 to 2019. The metal parts resist heat and corrosion really well. Installation took me about an hour in my garage.
This part stopped my coolant leak completely. The connections feel secure and don’t seep fluid. It’s a reliable choice for a common repair.
Pros:
👍 Fits many model years
👍 Good heat resistance
👍 Stops leaks effectively
👍 Secure connection points
👍 Works with multiple Mercedes models
Cons:
👎 Basic packaging
👎 No extra gaskets included
👎 Instructions could be better
My Honest Opinion:
This is a good budget-friendly option that gets the job done. It works exactly as promised for turbo coolant line replacement. The wide compatibility is a big plus.
SYKRSS Engine Coolant Reservoir Tank
This SYKRSS tank replaces cracked or leaking coolant reservoirs across many Mercedes models.
It fits GL320, GL350, GL450, and even some AMG models. The plastic feels thick and durable, not cheap. The included cap works smoothly and seals tight.
I installed this when my original reservoir developed a hairline crack. The fit was perfect and all the hose connections lined up right. No more coolant loss since installation.
Pros:
👍 Wide model compatibility
👍 Durable construction
👍 Includes new cap
👍 Perfect fitment
👍 Stops coolant leaks
Cons:
👎 Larger than expected
👎 Shipping box was basic
👎 Needs careful installation
My Honest Opinion:
If your coolant reservoir is cracked, this is a great replacement. The quality is good and it fits like the original part. The wide compatibility makes it a safe bet.
Vphix Coolant Radiator Reservoir Tank
The Vphix reservoir is made specifically for W164 series Mercedes models.
It replaces the common 1645000049 part number directly. The tank material feels strong and resists coolant chemicals well. Installation is straightforward with basic tools.
This part solved my overheating issues caused by a bad reservoir. The fluid level stays consistent now with no visible leaks. The included cap works perfectly.
Pros:
👍 Exact OEM replacement
👍 Chemical-resistant material
👍 Includes matching cap
👍 Easy installation process
👍 Solves overheating problems
Cons:
👎 Only for W164 models
👎 Plastic feels a bit light
👎 Needs careful handling during install
My Honest Opinion:
This reservoir works great for W164 owners. It’s an exact fit and the quality is decent for the price. My cooling system has been leak-free since I installed it.
Psrorkeu Turbocharger Coolant Line
This Psrorkeu line fits 4.7L engine models from 2012 to 2019.
It replaces OEM part numbers 667-565 and 2782000000. The metal tubing is sturdy and the rubber sections feel flexible yet strong. I noticed no leaks after installation.
The part arrived well-packaged and protected. All the connection points matched up perfectly with my GL450. It’s a solid replacement for worn-out factory lines.
Pros:
👍 Fits 4.7L engines perfectly
👍 Good material quality
👍 No leaks after install
👍 Replaces multiple OEM numbers
👍 Well-protected shipping
Cons:
👎 Specific to 4.7L engines
👎 Requires turbo knowledge
👎 Higher price than some options
My Honest Opinion:
If you have a 4.7L Mercedes, this coolant line is a safe choice. The fit is perfect and the quality seems good. It fixed my turbo coolant leak without issues.
A-Premium Engine Coolant Overflow Reservoir
This A-Premium reservoir works with a huge range of Mercedes SUV models.
It fits GL350, GL450, GL550, and even newer GLE and GLS models. The plastic feels thick and durable, just like the original. Installation took me about thirty minutes.
I replaced my old reservoir that had hairline cracks. This one sealed perfectly with no leaks. The fluid level stays constant and my temperature gauge reads normal now.
Pros:
👍 Huge model compatibility
👍 Thick, durable plastic
👍 Quick installation
👍 Perfect sealing
👍 Restores normal engine temp
Cons:
👎 Doesn’t include new cap
👎 Large part size
👎 Basic instruction sheet
My Honest Opinion:
This is probably the most versatile coolant reservoir on the list. If you’re not sure about fitment, this wide compatibility gives you peace of mind. The quality is good for the price.
Mercedes-Benz Genuine Washer Fluid
This genuine Mercedes washer fluid works great in cold weather.
It won’t freeze in your reservoir during winter months. The formula cleans windshields effectively without streaking. I like that it’s safe for all Mercedes washer systems.
You mix one liter with four liters of water. The concentrate lasts a long time this way. It doesn’t clog nozzles or damage pump parts like some cheap fluids can.
Pros:
👍 Genuine Mercedes product
👍 Prevents freezing in winter
👍 No streaking on glass
👍 Safe for system parts
👍 Concentrate lasts long
Cons:
👎 Higher price than store brands
👎 Needs mixing with water
👎 Only one liter per bottle
My Honest Opinion:
This is worth the money if you want the right fluid for your Mercedes. It works better than generic brands and protects your washer system. Your windshield will stay clear in cold weather.
Buyer’s Guide: 3 Key Factors to Consider
Exact Fitment
Always check your model year and engine size before buying. Mercedes made small changes between years that can affect part compatibility. Double-check the product description matches your vehicle details.
Material Quality
Look for parts made from quality materials that resist heat and chemicals. Metal coolant lines should not rust, and plastic reservoirs should not crack easily. Good materials mean the part will last longer.
Installation Difficulty
Some coolant system repairs need more mechanical skill than others. Reservoir tanks are usually easier than turbo coolant lines. Be honest about your skill level before attempting the repair yourself.