What Diagnostic Software Does Mercedes Use?

Most modern vehicles require a diagnostic test to discover potential faults. But what diagnostic tests does Mercedes use?

The leading diagnostic software used by Mercedes is called Xentry. Technicians and mechanics can use Xenetry to identify and diagnose potential issues with any Mercedes vehicle, speeding up repair times and ensuring a faster and easier repair process.

Read on to learn more about Mercedes’ diagnostic software and what you can do to ensure that you can diagnose any issues with your vehicle without problem or delay.

What is Xentry Diagnostic Software Used For?

As Mercedes’ main diagnostic tool, Xentry is used by technicians and mechanics to identify potential issues with Mercedes vehicles before getting to work on solutions.

Specifically, the primary functions of Xentry include the following:

  • Supporting all functions of Mercedes vehicles, starting with basic installation.
  • Identifying and carrying out repair instructions.
  • Coding of the electronic control system within a Mercedes.
  • Installing a new control box.

As with most modern vehicles today, diagnostic tools are required to help technicians identify software problems before proceeding with the correct repairs.

Xentry is used by Mercedes’ technicians and mechanics and is a leading diagnostic tool on the market today.

There are two different Xentry tools – Openshell and Passthru, and we introduce them both below.

What’s the difference between Xentry Openshell and Passthru?

Both Openshell and Passthru can read and clear errors, read the status of the vehicle in question, and show test plans.

They can also look up jack circuit diagrams and identify fault locations. In other words, they can both work well for mechanics and technicians.

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The primary difference between Openshell and Passthru is the devices that they connect with.

Openshell is best when connected to C4 devices, while Passthru is more flexible and can be used in a broader range of vehicles.

Ultimately, before deciding whether to opt for Openshell or Passthru, it makes sense to regard which diagnostic tool is best aligned with the model of your Mercedes to ensure that you purchase the best solution for your car. 

What Requirements Do You Need to Install Xentry?

Should you decide to purchase Xentry Openshell or Passthru, there are some specific system requirements that you need to bear in mind.

Of course, you also need to ensure that the diagnostic tool you purchase is compatible with your vehicle. So, here are some of the requirements you need to use Xentry:

  • A computer or laptop.
  • I5 generation 3 or higher.
  • A minimum of 4G RAM.
  • SSD256.
  • Windows 10 or later.

The system requirements are detailed in the Xentry user handbook, and you can review precisely what you need to run Passthru and Openshell before choosing the right plan for your Mercedes vehicle.

Is a Mercedes Diagnosis Test Worth it?

Due to the advancements in the computer systems used in modern vehicles, diagnostic tests have become a key feature of the service of any car. 

While you can self-run diagnostic tests with the correct software – as introduced above – you can hire a mechanic or technician to run a diagnostic test on your Mercedes. The benefits of doing this include the following: 

  • Running diagnostic tests can help you identify potential vehicle issues early, saving you money in the long run before they negatively impact your car.
  • Car diagnostic tests can also enhance your vehicle’s safety- one thing they show is the need to change your brakes, which is super important for road safety.
  • Another benefit of diagnostic testing is that it checks your car’s computer system for any notifications or stored information. Technicians can then use this information to carry out the correct repairs.
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While it might seem like an additional expense associated with maintaining your vehicle, the reality is that running a diagnostic test on your Mercedes will have long-term benefits as far as the performance of your car is concerned.

How Long Does a Mercedes Diagnostic Test Take?

The good thing about running a diagnostic test is that it doesn’t take long. Most technicians can complete a diagnostic test within 60 minutes, enabling them to discover any faults with your vehicle’s computer system. 

Of course, following the diagnostic test, your Mercedes might need some work, which the technician will recommend scheduling at a convenient time.

But given that diagnostic tests are quick and efficient and can improve the safety and performance of your vehicle, they’re worth it.


Mercedes technicians use the Xentry diagnostic tool, and two options are available – Passthru and Openshell.

Both are viable solutions for fault-finding and can reveal issues with your Mercedes that you can then look to rectify before they affect the safety and performance of your vehicle.

So, if you’re on the fence about whether to run a diagnostic test, go for it, as it can significantly improve the driveability of your Mercedes.