It sounds like you're trying to access a multi-part guide, likely the e-book which is often sold in split .rar files due to size limits.
If you get a "Checksum Error," one of the parts might be corrupted. Try downloading them again. Carmaitainance101.part2.rar
To "make this feature" work on your device, you need to combine the parts correctly. Here is how to handle a .part2.rar file: 🛠️ How to Extract Multi-Part RAR Files It sounds like you're trying to access a
A .part2.rar file is useless on its own; it contains the second half of the data needed to rebuild the full document. Carmaitainance101.part2.rar