How to Fix Mercedes A-Class Mechatronics Fault

Driving a high-end vehicle like the Mercedes A-Class should provide you with a smooth driving experience, right?

But what happens if it doesn’t?

This was precisely the case for our client, who found their recently purchased A-Class challenging to handle due to erratic jerking and gear-shifting problems.

It left our client worried that there could be other hidden issues, leaving them concerned about their vehicle’s roadworthiness. Thankfully, they brought their vehicle to our Mercedes experts at Fitch Autos.

What We Found

To start with, our skilled technicians took the client’s Mercedes for a test drive to verify the reported problems firsthand. The vehicle was highly jerky during gear changes and wasn’t the experience you’d expect from an Audi A-Class. 

Our Mercedes expert had a hunch about the underlying issue but they wanted to be 100% sure before proceeding with any work.

To help get a better understanding of the problem at hand, a diagnostic test was performed. The diagnostic scan unveiled the following fault codes: 

• 056200 – This indicates a low voltage in the power supply circuit 87
• 051300 – This shows that the start enable was not issued

While fault codes might not reveal much to you, to our Mercedes specialists, they paint a picture, providing them with deeper insight into the vehicle’s issues.

Armed with this information, our experts consulted the Mercedes technical wiring diagrams to understand the issue at hand better. 

As your local independent Mercedes specialist, we have access to the same level of technical information as the main Mercedes dealerships. This allows us to provide the highest level of care at a value better than that of a dealership. 

At Fitch Autos, we employ a comprehensive 15-step diagnostic process for assessing every vehicle. This method guarantees we pinpoint your vehicle’s problems efficiently, saving you time, stress and money. 

Thanks to our approach and our Mercedes expert’s decades of knowledge, we identified the Mercedes A-Class problem during our client’s initial visit—a feat that most other garages couldn’t achieve.

Diagnosing the Issue

During our thorough 15-step diagnostic review, our Mercedes expert meticulously tested the transmission’s power and grounding using the manufacturer’s wiring diagrams as reference. 

The tests showed no external faults, leading to the conclusion that the vehicle’s problem was within the transmission’s mechatronics unit. This component transforms the Mercedes A-Class electronic commands into hydraulic actions within the gearbox. 

As you can imagine, it’s a pretty important part of your vehicle. 

If your Mercedes mechatronics unit malfunctions, it will disrupt the connection between your engine and gearbox, risking performance, comfort and even your safety.

Although our client’s Mercedes remained operational, their safety was at risk and the issue needed to be addressed immediately.

A common symptom of this failure is the vehicle unexpectedly reverting to neutral, which could be particularly hazardous while driving at high speeds or on busy motorways. It’s a nightmare scenario that you want to avoid at all costs.

Fixing the Mechatronics Malfunction

Upon pinpointing the problem, our Mercedes technician contacted the client to discuss our findings and the recommended fix. 

At Fitch Autos, transparency is key; we ensure you’re always kept informed and only start fixing your Mercedes when you say so. You’re in complete control from start to finish.

Our client approved the Mechatronics unit replacement, and our experts got straight to work. 

As your local independent Mercedes specialist, we only use genuine Mercedes or premium-grade aftermarket parts to ensure you get nothing but the best for your vehicle. We sourced a genuine Mercedes mechatronics unit for our client’s Mercedes A-Class. 

During installation, we used the advanced Xentry Kit 4 Mercedes diagnostic and programming tool, which not all garages possess or have the skills and knowledge to operate. 

Following the installation and reprogramming, our specialists retested the Mercedes to see if the issue and fault codes had cleared. 

Thankfully, the previously detected fault codes were resolved, and the vehicle ran like new without signs of jerkiness. 

Our client was relieved to have their Mercedes A-Class functioning smoothly but was also pleasantly surprised that they’d received dealership-level quality for better than dealership value. 

They drove away with a smile and a fully functioning Mercedes A-Class. 

Summary

When our client noticed their Mercedes A-Class wasn’t performing as it should, with jerky movement and gear-shifting faults, they turned to our Mercedes specialists at Fitch Autos. 

Our team used our 15-step diagnostic process and decades of experience to identify the root cause of the problem during the first fix – the client’s vehicle needed a new mechatronics unit.

We efficiently sourced, installed and programmed the replacement unit during their initial visit, restoring their Mercedes A-Class to peak performance. The transformation was remarkable, with the car driving smoothly and all previous fault codes resolved.

Moreover, our client benefited from significant savings compared to dealership repair costs. 

If you’ve got Mercedes gear change issues, don’t let gearbox troubles slow you down. Contact our experts at Fitch Autos for a solution that combines quality, efficiency and value. 

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