The C350e hybrid mode fails to activate.

[almamater78]

Greetings, I possess a fully charged electric vehicle battery. However, for the past few months, the Electric mode has not activated when the vehicle is configured to Hybrid. Given the cold months, I suspected the battery was inadequate, thus preventing the activation of electric mode. Nevertheless, as the temperature rises, I observe that the electric mode remains disabled, and the start-stop mechanism is also nonfunctional.


Do you have any insight into the problem?

Thank you in advance.

[MercedesMan98]

A defective or ageing battery may appear fully charged, although it may not be generating sufficient current or voltage if it is malfunctioning. This is really a conjecture; you should get the error codes diagnosed. However, a friend experienced a comparable problem with his 48V hybrid Kuga, and a new battery (covered by warranty) resolved the issue.

[godisgreat]

If the vehicle remains under warranty, return it to the dealer for inspection.

[almamater78]

Regrettably, it is a 2017 model, thus lacking warranty coverage. I will insert the fault code reader and verify. However, the dashboard screen is devoid of any visible information.

Thank you

[godisgreat]

Hello, when did you purchase the vehicle? Was it a recent acquisition?

[almamater78]

I purchased the vehicle four years ago from a used auto dealer.