What happens if you fill it with distilled water beyond the recommended level?

Hi Cheryl. Thank you for your question. If distilled water is overfilled or overflows, it may cause the battery to corrode or damage the car's paint. This is because when the engine is running, distilled water becomes acidic. If there is an excess of distilled water, it will become acidic water that overflows, potentially damaging various parts of the car.