Volkswagen is gearing up to fix the cars affected by its diesel emissions cheating scandal -- though the specifics are still up in the air. The company's new CEO, Matthias Mueller, told employees that it'll be reaching out to customers in the next few days about getting their diesel cars retrofitted, Reuters reports. However, it's still unclear how, exactly, VW is going to update those cars. It'll most likely be some sort of software-related fix, since it got into hot water over software that was programmed to misrepresent diesel emissions when cars were being tested. We can expect regulators to scrutinize VW's solution to make sure it's actually solving the problem. It'll also likely affect the mileage and performance of the company's cars, which so far have been some of VW's main selling points. Volkswagen is prepared to spend up to $7.3 billion to clean up the mess, which is getting worse the more we learn (it apparently knew about the test cheating years ago, for one).