Targeted: Amex Offers 20% off SIXT Rental Driving a Benz is way too expensive, right? WRONG! SIXT is a ballllllller rental car company with loads of European whips and you should be behind the wheel of one. How? Amex...
Love me some Sixt Platinum Status- 6 day Benz rental for ~$140

Miles got a sick upgrade after he matched to Sixt's Platinum status.
Why you should always ask about upgrades

Miles discusses the advantage of negotiating an upgrade at check-in