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Actually, the main battery is located in the trunk. Remove trunk liner and it will be on the right next to the spare tire. The auxillary battery is located under the hood, next to the engine under the cabin filter. If you're having trouble with the main battery, you will probably need to check that one out as well.
TO RESET YOUR ENTIRE SYSTEM ELECTRONICALLY YOU NEED TO DISCONNECT THE AUXILARY BATTERY UNDER THE BONNET ON THE LEFT HAND SIDE WHICH SITS BELOW THE POLLEN FILTER. THIS PROCEEDURE WILL RESET YOU ENTIRE SYSYTEM BACK TO RAW FACTORY SETTINGS AND ERASE ALL ERROR MESSAGES FROM THE CPU. ONCE YOU HAVE COMPLETED THIS THEN RESET YOUR PREFERENCES FOR DRIVING VIA THE STEERING WHEEL BUTTONS FOR INSTRUMENTATION, LIGHTS, VEHICLE, TIME & DATE WITH CONVENIENCE SETTINGS SUCH AS MIRRORS CLOSURE.
This will not work on a 2003 E320 CDI. I tried it and it made no difference whatsoever!! Error messages are still there.
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∙ 13y ago
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Waiting for the answer.
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Cr2025
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