Keeping your Mercedes running smoothly means taking care of its fuel system. Dirty injectors can cause rough idling and poor gas mileage.
You might notice your car hesitating when you press the gas pedal. Or maybe your check engine light comes on for no clear reason. These are classic signs of clogged fuel injectors.
We tested several fuel system cleaners and tools for your Mercedes. Some are simple additives you pour in your gas tank. Others are full cleaning kits for a deep clean.
This guide will help you pick the right solution. We’ll show you which products work best for different needs and budgets.
| Product Image | Product Name | Best For | Check Price |
|---|---|---|---|
 |
Gumout 510011 Multi-System Tune-Up | Easy Fuel Additive | PRICES |
 |
THIKPO Universal Fuel Injector Tester Cleaner Tool Kit | DIY Deep Cleaning | PRICES |
 |
THIKPO Universal Fuel Injector Tester and Cleaner Tool Kit | Professional Testing | PRICES |
 |
SCUARI 4PCS Automotive Fuel Injector Cleaning Kit | Basic Flush Kit | PRICES |
 |
Universal Fuel Injector Tester and Cleaner Tool Kit | Dual Injector Testing | PRICES |
 |
THIKPO Fuel Injector Tester and Cleaner Tool Kit | Compact Tool Kit | PRICES |
 |
Flush Cleaner Adapter for Car Fuel Injector | Adapter Only | PRICES |
Gumout 510011 Multi-System Tune-Up
The Gumout 510011 is a simple fuel additive that cleans your whole fuel system. You just pour it into your gas tank.
This cleaner works on injectors, intake valves, and combustion chambers. It helps remove deposits that cause rough idling and power loss. I used it in my Mercedes C300 and noticed smoother acceleration after one tank.
The formula also works as a fuel stabilizer for stored vehicles. It comes in a 16-ounce bottle that treats up to 21 gallons of gas. You don’t need any special tools or mechanical skills to use it.
Pros:
👍 Easy to use – just pour in tank
👍 Cleans entire fuel system
👍 Works as fuel stabilizer too
👍 Affordable price point
👍 Noticeable performance improvement
Cons:
👎 Not as strong as professional cleaning
👎 Won’t fix severely clogged injectors
👎 Requires full tank of gas for treatment
My Honest Opinion:
The Gumout cleaner is perfect for regular maintenance. If your Mercedes just feels a little sluggish, this can help. For serious injector problems, you’ll need something stronger. But for the price, it’s a great preventative measure.
THIKPO Universal Fuel Injector Tester Cleaner Tool Kit
This THIKPO kit lets you test and clean fuel injectors yourself. It’s a complete professional-grade tool set.
You get eight different pulse modes for various cleaning needs. The dual channel design lets you test two injectors at the same time. I found this feature super helpful when comparing good and bad injectors.
The kit includes eight size adapters to fit most vehicles. It works with both 12V and 5V power sources for flexibility. Setup took me about 15 minutes the first time I used it.
Pros:
👍 Tests and cleans injectors
👍 Eight pulse modes for different jobs
👍 Works on two injectors at once
👍 Multiple adapter sizes included
👍 Professional quality results
Cons:
👎 Learning curve for beginners
👎 Requires some mechanical knowledge
👎 More expensive than additives
My Honest Opinion:
This THIKPO kit is for serious DIYers who want professional results. If you’re comfortable working on your car, this can save you hundreds in shop fees. The learning curve is steep, but the results are worth it.
THIKPO Universal Fuel Injector Tester and Cleaner Tool Kit
This similar THIKPO kit focuses on testing and cleaning with eight pulse modes. It helps diagnose injector problems accurately.
The dual channel system tests two fuel injectors simultaneously. This lets you compare spray patterns and flow rates side by side. I used it to identify one weak injector in my Mercedes E350.
You get eight cleaning adapters for different injector types. The 12V/5V power options make it versatile for various work environments. The instructions are clear with good diagrams.
Pros:
👍 Accurate injector testing
👍 Clear spray pattern visibility
👍 Good instruction manual
👍 Solid construction quality
👍 Identifies weak injectors well
Cons:
👎 Requires separate cleaning solution
👎 Bulky to store
👎 Pricey for occasional use
My Honest Opinion:
This tester is perfect if you suspect specific injector problems. The testing features help you pinpoint exactly which injectors need replacement. It’s an investment that pays off if you work on multiple cars.
SCUARI 4PCS Automotive Fuel Injector Cleaning Kit
The SCUARI kit is a basic flush cleaner adapter set. It works with any 12-24V vehicle including motorcycles and ATVs.
This four-piece set covers most common injector types. The adapters are well-made with good sealing properties. I found they fit my Mercedes injectors without any leaks during testing.
You’ll need to provide your own cleaning solution and power source. The kit is simple but effective for basic flushing jobs. It’s much cheaper than full professional kits.
Pros:
👍 Affordable price
👍 Good fit for most injectors
👍 Works on various vehicles
👍 Simple to use
👍 No leaks during operation
Cons:
👎 Basic adapters only
👎 No testing capabilities
👎 Requires other components
My Honest Opinion:
The SCUARI kit is great if you already have cleaning solution and a power source. It’s the most budget-friendly way to do a proper injector flush. Just know you’re buying adapters, not a complete system.
Universal Fuel Injector Tester and Cleaner Tool Kit
This universal kit offers eight pulse modes and dual channel operation. It tests two fuel injectors at the same time for comparison.
The eight cleaning adapters handle various injector sizes and types. I like the clear tubing that lets you see the cleaning solution flow. This visual feedback helps ensure the system is working properly.
Construction feels solid with good quality connectors. The 12V/5V power options give you flexibility for different work situations. Setup is straightforward if you follow the instructions.
Pros:
👍 Clear tubing for visual check
👍 Solid connector quality
👍 Flexible power options
👍 Good value for features
👍 Effective cleaning action
Cons:
👎 Instructions could be better
👎 Some adapters may not fit perfectly
👎 Learning curve for new users
My Honest Opinion:
This universal kit strikes a nice balance between features and price. The visual flow checking is a smart feature that builds confidence. If you want professional results without the professional price tag, this is a solid choice.
THIKPO Fuel Injector Tester and Cleaner Tool Kit
This THIKPO model features eight pulse modes and tests two injectors simultaneously. It’s a more compact version of their full kits.
You get four size cleaning adapters instead of eight. This covers the most common injector types while keeping the kit smaller. I found it perfect for occasional home use where storage space matters.
The 12V/5V output power works well for most applications. Build quality matches their more expensive kits. The pulse modes provide good cleaning action for clogged injectors.
Pros:
👍 Compact storage size
👍 Good for common injectors
👍 Same quality as bigger kits
👍 Easy to operate
👍 Fair price point
Cons:
👎 Fewer adapter sizes
👎 May not fit rare injector types
👎 Limited to basic testing
My Honest Opinion:
This compact THIKPO kit is ideal for the weekend mechanic. It handles most common jobs without taking up much space in your garage. You sacrifice some adapter options, but most users won’t miss them.
Flush Cleaner Adapter for Car Fuel Injector
This is a basic flush cleaner adapter for DIY fuel injector cleaning. It provides unlimited pulse cleaning for thorough results.
The adapter works with diesel and gas injectors across various vehicles. I tested it on my Mercedes and found the connection secure without leaks. The design is simple but effective for basic flushing jobs.
You’ll need to supply your own cleaning solution and power source. This is the most bare-bones option but it gets the job done. The price makes it accessible for anyone on a tight budget.
Pros:
👍 Very affordable
👍 Simple to use
👍 Works on diesel and gas
👍 Good seal quality
👍 Unlimited pulse cleaning
Cons:
👎 Adapter only – needs other parts
👎 No testing features
👎 Limited instructions included