From your window related post, I'm guessing that you noticed this immediately after the starter was replaced, and the battery reattached.

You will have to enter your radio code to unlock it, following the procedure in the owner's manual. Assuming that your LCD display still works, does the word CODE appear?

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1996 C280 289K Traded
1997 E420 167K Traded
2001 S430 240K Traded
2010 E550 4matic 80K
2000 GMC Jimmy 198K Gone to Boneyard
2003 Camry LE 196K
2011 Mazda3 i Sport 31K