sytema

hi, i just got my car which is a 1999 clk 430 black with black interior.. and i notice that my radio wasn't working.. i checked on the radio and the radio turn on but no sound, so i check the amp and notice that the amplifier was missing.. and now for me to get the amplifier from mercedes they need the amplifier number... which i don;t have.. if possible can anyone tell me they amplifier number so i can order one ... my radio has button on its face like a telephone.. nothing facing just a regular bose radio i guess.. thanx for the space..

ps: mercedes has 3 different amplifiers on stock..