Pulling radio is probably best to do to confirm code. After disconnecting the battery my radio would not play( 95 SL500) Did not have the code so went to the dealer and they looked it up for me. Radio still would not play. Turns ouat my radio must have been replaced and when dealer pulled it out athere was the correct code written on top of radio case. Took about 30 seconds to pull radio with the radio tools.

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95 E420 ( 76K) SOLD
85 380SE(125k)
95 SL500(72k)