ignition key won't turn, steering wheel locked

Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. I'm sorry to hear you're having trouble with your vehicle. Since your Z8 has been sitting with a dead battery for months, the steering wheel lock and ignition key could be stuck due to a lack of power or mechanical wear in the ignition components. Even though you're using a booster, the battery may be too drained to hold any charge, preventing the ignition system from functioning. First, try replacing or fully recharging the battery to ensure enough power to unlock the steering and turn the key. You can also try turning the steering wheel left or right while gently wiggling the key to see if that frees up the ignition lock. If it still doesn't budge, you might be dealing with a faulty ignition lock cylinder or steering lock solenoid, which could require professional assistance. If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!