Your Grand Prix tape/radio was created at a time before the word "Digital"
was in our vocabulary. It's radio is poor by today's standards, and nobody
makes cassette tape anymore or listens to tape anymore. Merceders-Benz would
be hard pressed to find a customer who would spend over $100K and who
listens to music at home  from cassettes. The first compact disc was
introduced over 20 years ago by Sony-Billy Joel's "52nd Street". All the
developed nations of the world listen to music from compact disc. There are
still Mercedes owners out there who are afraid to replace the antiquated
speakers and tape radio in their prized automobile. The radio can be removed
in under five minutes, and the speakers within ten. All aftermarket speakers
are four ohm impedance and match the speaker outputs on the cd head unit
perfectly. You may shake your head and wonder why a brand new Benz comes
with a cassette deck in the dash! The only answer is greed. After spending
huge money for a new E-Class or S-Class, the salesman offers you the option
of paying absurd money for a cd changer which should have come with the car!
It is not illegal in this lifetime to replace your antiquated,
poor-sounding, tape/radio and speakers with a digital cd player which
produces sparkling clear music of your choice. You wouldn't replace your
tires with tires from 1986 would you? P.