Due to your battery disconnection the radio is asking for its anti theft code. You can try looking in your owners manual for the new code, i found mine in there, the dealer will scrible it in with a pen usually. If not, then you have to go to the dealer to retrieve your radio's code. They will need the VIN no. to look it up. Also, some dealers require some verification of ownership before they will give you that info, be prepared!
01 ML55 AMG
92 500E (a few mods)
87 300E (lots of mods)
00 Chevy 3500HD Diesel Box Truck
68 18' Donzi Marine
06 GT i-Drive7 1.0 Mountain Bike (with GPS!
PREVIOUSLY OWNED:83 300SD, 87 420SEL, 88 420SEL, 90 420SEL, 86 560SEL, 86 190E 2.3-16V AMG, 94 E320