Q: Chrysler 300 C 2012.... battery saver mode

If there is an unusual odor (you refer to a burning odor), I would not drive the car. Other than the odor issue, based on what you are describing you are not going to worsen the situation. A particular concern, technically speaking, is the battery issue. For example, if the battery is not being charged properly you will eventually break down. It is possible to have the vehicle inspected and repaired, on a mobile basis, right at your location. If you desire that service, please request a check engine light diagnostic. During a check engine light diagnostic, a certified mechanic from YourMechanic would use a code scanner to retrieve the specific diagnostic trouble code(s) from your car’s PCM that have caused the various warning lights to illuminate. Using those codes, the appropriate individual vehicle components or sub-systems (often a sensor, circuit, and the like) are then carefully tested, based on specifications set forth in your car’s Factory Service Manual, to pinpoint the cause of the fault or the reason why the check engine light, or other warning light, has illuminated. Once the faulty part or component is identified, it is explained to your satisfaction and the mechanic will let you know of the cost to repair. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.