Mercedes M Klasse Hybrid Electrical Issues

These are unusual symptoms Have you seen any flickering or dimming of the dashboard light while starting Does the issue occur more often under specific conditions such as after the vehicle has been sitting or during high humidity

I haven't noticed any flickering but I will pay attention next time It seems to happen more often after the car has been sitting overnight or for a few days Humidity might be a factor Is there a specific electrical component prone to failure with humidity

Given the intermittent nature of the fault the potential influence of humidity and the issue worsening after inactivity I suggest consulting a technician The symptoms could indicate a more complex issue potentially related to the ignition switch While a fuse could be the culprit it's unlikely to be the sole cause

I went to a mechanic It was a hidden fuse related to the ignition circuit It cost 52€ to replace Thanks for pointing me in the right direction