Go to a dealer and get another Master Key and a new Valet key. Take your registration with you as they will only sell you a key if you are the registered owner of the car. I think a master key is $35.00 and a Valet Key is $18.00.

Great to have spare...just in case.

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1986 Euro 500SEC "RUF" 9:1CR, "Rose"
1985 Euro 500SEC Cabriolet AMG Widebody
1982 Euro 500SEL "Blue"
2001 Texas Heeler (Aussie/Queensland X) "Sulphie",
2012 Queensland Red Heeler "Squeak"
Best dogs I've ever had.