error code 30 mechanical converter lockup clutch monitoring and light blinker issue

[BiiQ X5]

Hello 03 x5 4.6is owner. Just purchased this car from a dealership and found this error with my scanner. Dealership said they will take care of it but I just want to make sure if that's what it is. When the car starts up for the first time I get that whining and hissing noise coming from the front near the alternater but i tried spraying belt conditioner there and it did not change the noise so I assume its coming from the transmission. After driving it for a while the noise starts to calm down and eventually it fades off. There is no transmission noise and its changing gears smoothly. I also hear the noise change when I put it in reverse or drive or any gear. What could it be?


Also My rear left blinking light does not work. I tried changing the bulb and its still not working. Could it be the ground contact or something behind the light harness?