The answer is that the guarantee is an agreement that the automaker made with the buyer who said they will repair your car if certain types of injuries occur in certain circumstances.

Car rental also allows you to get a new car and if the car is new then the chances of crash is very slim. Of course, there will be times when it will break down, but there is nothing to fear because the guarantee will cover the repair costs.

Also with a merchant you might be able to negotiate a comprehensive used car warranty at a cost of broker in the deal.

If you find that the guarantee you receive is not what you really wanted, or that the company you are going through is not what you want, your next warranty can still be purchased elsewhere.

In this day and age of computerized, technically difficult to repair automobiles, which will you take your car to the service, both warranty and non warranty related.