Can anyone tell me how to tune AM on my concert head unit? The car came without an manual for the radio, and I've tried to find one on the internet to no avail. When you press the scan buttons, the radio scans (unsurprisingly). But it never locks onto anything so just keeps going round and round. What i want to be able to do is move in frequency steps manually one by one. Specifically i want to be able to tune into 5 live on 909, not just 593 (which is stored in the memory). This must be possible, right?