Fender Tag help 69 barracuda

You can find the codes for options here
http://www.hamtramck-historical.com/dealerships/1969SalesmansPocketGuidesPlymouth-01.shtml

Interior code D6B here
http://www.hamtramck-historical.com/dealerships/1969PlymouthColorAndTrim-02.shtml

b5 after D6B is the upper door frame color

526 is may 26 1969 sch prod date

C11 is probably G11 - tinted windows all

Those online decoders have some real bugs in them. Have to take one of the first two B5's out to get it right for that line.