Is there anything a 16 year old can do at a car dealership? (job)?

I'm 16 years old, and looking for a summer job at the local Jaguar dealership. My grandfather knows one of the lead salesman well and has bought 4 jaguars from him in the past so I at least have a better shot than a regular kid. I'm just wondering what i'll be allowed to do there? would i be allowed to shuttle cars around the lot even though i only have my permit? Would they let me wash / detail cars etc? I'm just wondering if there's anything else i should suggest to them to get hired. I'd really like to work there.