It's a Vehicle Master Inquiry that can be done at a dealer. I've never had a dealer not do one for me and they have never charged me for it. It lists every warranty repair ever done on the car and gives all of the vehicle ID information including radio code, etc. I find it a very useful document to have.

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Len
'59 220S Cabriolet-SOLD and living happily in Malta
'83 240D 351,500 miles original owner-SOLD
'88 560SL 41,000 miles - totaled and parted out
https://sites.google.com/site/mercedesstuff/home
'99 E300 turbo 227,500 miles
'03 SLK320 40,000 miles - gave to my daughter
'14 Smart electric coupe 28,500 miles
'14 Smart electric cabriolet 28,500 miles
'15 Smart electric coupe 28,000 miles