Paint color: Smoke Silver Metallic 702/9702

KeyFob - KR 55 4 Button

http://www.keylessremotewarehouse.com/mercedes_oem_mercedes_benz_4_button_kr55_kr_55_keyless_remote_entry_keyfob_transmitter_control_switchblade_vehicle_fob_clicker_beeper_w_new_notched_flip_key_pre_owned_275e3o_c_p1194.htm

 Proper procedure for resync key from Benz for the 1998 SL500 is...

close doors stand 5 feet away from door handle
point fob led at the handle and press the lock button twice.
within 20 seconds unlock door put key into the ignition turn to position 2 or to all the dash lights on ie. test position.

If key fob causes dash to say "start error" that is usually because the little black transponder glued in the corner of the old keyfob wasn't transferred to the new keyfob