Some Mercedes-Benz E320 owners report experiencing battery draining issues that lead to the loss of convenience features such as heated seats, heated steering wheel, and interior lighting. These problems tend to worsen in cold weather, significantly affecting vehicle operation. To mitigate battery drain, some owners have found success by resetting the system through a battery disconnection for 10 minutes, ensuring they have the necessary radio code and window/sunroof synchronization information. Additionally, driving the vehicle for 20 to 30 minutes with the RPM over 1200 is recommended to help maintain the battery's charge during colder conditions. These concerns underscore the importance of addressing battery-related issues promptly, especially in adverse weather.
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