⚡ Fast, Professional Mechatronic Repairs for:

🚗 Mercedes-Benz CVT 722.8 (Autotronic) Mechatronic

⚠️ Common Symptoms of 722.8 Mechatronic Failure:

❌ No gear selection / delayed engagement
🔁 Vehicle stuck in Limp Mode
⚙️ Harsh, slipping, or unstable gear changes
📉 Loss of drive after warm-up
🚫 Failure to shift properly under load
🔄 Intermittent or permanent “Transmission Visit Workshop” warning

🔍 Typical Fault Codes:

0793 – RPM Signal From Y3/9B4 (CVT Secondary RPM Sensor) Not Available
➡️ Indicates failure of the secondary speed sensor inside the mechatronic.
Occurs due to internal circuit, sensor, or board failure — not an external wiring issue.

0722 – RPM Signal From Y3/9B5 (CVT Output RPM Sensor) Not Available
➡️ Points to failure of the output speed sensor integrated in the mechatronic.
This is one of the most common 722.8 faults and will return until repaired properly.

✔ Both RPM sensor faults are internal to the mechatronic and cannot be fixed by replacing external parts or performing resets.

🛠️ What We Do:

We professionally repair Mercedes-Benz CVT 722.8 Autotronic mechatronic units, fully restoring operation — no complete gearbox replacement required.

✅ We Fix:

• Failed internal RPM sensors (Y3/9B4 & Y3/9B5)

• Speed sensor circuit faults

• Pressure regulation & solenoid issues

• Harsh, slipping, or unstable shifting

• Loss of drive & limp mode activation

• Electrical / PCB internal failures

• Temperature-related drive loss

🔧 Suitable For:

🔧 All 722.8 Autotronic Mechatronic Units
Installed on Mercedes-Benz A-Class & B-Class (CVT models).

🔄 Our Repair Process:

🔧 Complete disassembly & diagnostic inspection
🧰 Replacement of failed internal electronic and sensor components
🧪 Bench testing for correct RPM sensor output & pressure control
⚙️ Verification of full mechatronic function before return

✔ After refitting, only Basic Settings are required — no coding or programming needed.

💡 Why Repair Instead of Replace?

💸 Replacement gearbox/mechatronic is extremely expensive and often unnecessary
🔁 Repairs target the core issues: sensor, circuit, and internal board failures
💬 Long-term, reliable fix with professional support
🔧 The common RPM sensor faults cannot be resolved without a proper internal rebuild