Update: Dealing with SIXT has been something of a nightmare. I got my credit card company involved for the insurance waiver coverage, but SIXT has been ignoring their "release letter" requests, three of them sent since 12/13/17. SIXT has turned the account over to a US collections company, RMS, which has been harassing my daughter (she had the emergency contact number on my rental form) pretending to be various people, most lately a Doctor. Very odd. I'm actually looking forward to RMS finally figuring out how to contact me directly; there's nothing they can tell me that could cause any grief on my part! Apparently they don't know about Google.

It will be interesting to see how this all turns out. When the account was turned over to RMS, the total amount for all damages suddenly increased to $3000, by the way. My cc insurance representative says I only owe for the $25 appraisal fee; all else will (eventually?) be covered.

Does anyone have a "good" contact email for SIXT that might help get this resolved? Thanks-