⚠️ Important Notice

All content on this site is for general information only and does not replace professional mechanical advice.
Always consult a qualified technician before performing any repair — especially brakes, steering, fuel systems, or EV high-voltage systems.
MyCarFault and Selenga Labs accept no liability for damage, injury, or loss resulting from use of this information.
User-submitted reports are not independently verified.

By accepting, you confirm you have read and agree to our Terms of Use and Privacy Policy.

Your IP address and browser information will be recorded as proof of this acknowledgement. This data is retained for 12 months.

Mercedes C300de W206 PHEV Annual Battery Check — Mercedes-Benz C-Class 2021 | MyCarFault

Mercedes C300de W206 PHEV Annual Battery Check

Mercedes-Benz C-Class 2021 OM654 PHEV 25.4kWh

On This Page: 🔧 All Repairs ⚠️ Avoid These 🔗 Similar Faults

⚡ Quick Summary

Severity Level

Medium

Safe to Drive?

✅ Safe to Drive

Safety Impact

No direct safety impact reported by owners

Urgency Level

🟡 Monitor Closely

C300de W206 PHEV annual check: 25.4kWh HV battery SOH, OBC AC charging speed, heat pump function and OM654 EGR inspection at 80,000 miles.

Repair / Solution

No confirmed fixes yet. Share yours below.

⚠️ Wrong Diagnosis?

No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this Mercedes-Benz C-Class 2021 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.

🚗 More About This Vehicle

📋 All Mercedes-Benz C-Class fault reports → 🚘 All Mercedes-Benz fault reports → 🔧 Browse all fault reports →

Explore more Mercedes-Benz models

Mercedes-Benz E-Class 85 Mercedes-Benz Sprinter 30 Mercedes-Benz A-Class 30 Mercedes-Benz GLC 28

Help other owners by sharing your experience.

Your real-world fix helps thousands of drivers worldwide. Takes 2 minutes.

✅ Submit a Fault ❌ Wrong Diagnosis?

🔧

Usta

● Online