Just tell her to not beat the heck out of it, and that she is going to have to stick to the maintenance schedule religiously, and make sure she is familiar with how to check the maintenance schedule on the cluster and in the service booklet.
Most female customers I have had with SLK's cannot really afford the maintenance, brakes, or the car in general and tend to slack off when it comes time for maintenance, then small problems that would have been found during the routine checks grow worse and end up costing some money, then they only want to fix this here and that here and then it keeps adding up so tell her to be prepared to spend some money from time to time to keep her car tip top.
If she slacks on maintenance now, it will end up costing more in the long run.
Make sure you use recommended parts and oils.
Tell her do not by any means top off the fuel at the gas pump unless she has about 12-1500 bucks laying around.