Among the MANY radio diagnostic procedures in WIS and also in the W210 Service DVD, is one noting that metallized tint on windows will interfere with radio reception and noting as well that if the tint is cut to fit at the window the possibility exists that the antenna wires glued to the glass may have been cut.

There are more diagnostics.

Dealer of 800.for.merc for the Service DVD

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Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles