Pickup Location (airport, city, or ZIP code/postcode): LAS
Dropoff Location (if different) (airport, city, or ZIP code/postcode):
Pickup Date and Time: 6/17/13 1000
Return Date and Time: 6/25/13 1000
Vehicle Size Preference: Mercedes E-class
Memberships (AAA/USAA/airline FFP/etc): Amex plat (used CDP633306)
Best Price you've found, Hertz or otherwise: GBP456 / USD700

I'd love to hear about a PC I can use that will lower it further.

Ideally, I'd like to take the e-class and swap to a Camero ss for the last 2/3 days (as it is much pricier to rent separately) - is this feasible without additional charge?

Thank you in advance.