2001 Audi A3 electrical problem

Hello,
I have a problem with my Audi A3 SE 1.6 2001 (Y-reg).
If car was not driven for more than 2 days it is impossible to switch on engine without booster (battery runs off). However when I trying to
switch it without booster it shows "FUSE". After boosting everything seems ok and even after 15 minutes drive engine starts normally.
I guess it could be Alarm Fuse problem because sometimes it starts alarm without any reason. Have tried to switch off interior monitor (near driver's door) but didn't help.
Any solutions?

Sorry ignore this, I didn't read your post properly!

Last time I saw "FUSE" on my dash I had just connected the jump leads in reverse and blown one of the main fuse links on top of my battery. I'd also fried my gearbox ECU, costly mistake! Check those fuse links and all your other fuses then do a fault code read to see if all your ECUs are okay.

You mean to check all fuses?
I have connected OBD2 but it shows no codes. :(

My next move would be to put a new battery in.

Battery is 2 months old. Don't think it's old enough.
When this problem happened I change it straight away.

Maybe this would help to diagnose the problem:
http://www.youtube.com/watch?v=rn2_jahkW2Q
It makes this strange sound and "resets" the dash every 10 seconds.

Checked by other much proper scanner:

Codes are:

01 Engine

- 17978 - Engine Start Blocked by Immobiliser P1570

- 18057 - Powertrain Data Bus: Missing Message from ABS Controller: P1649



15 Airbags

- 00532 - Supply Voltage B+

sporadic: Signal too low



17 Instruments

- 00562 - Sensor for Oil level/Temperature

- 00668 - Supply Voltage Terminal 30

sporadic: Power supply to small

35 Central Locks

- 01367 - Central Locking Pump Runtime Exceeded (likely Leak) static: no

- 01371 - Alarm triggered by Driver's door

static: no

- 01370 - Alarm triggered by Interior Main

- 01369 - Alarm triggered by Hood Switch

- 01368 - Alarm triggered by Luggage

- 01366 - Opened Due to Crash Signal

static: no

indication: on

- 01365 - Lock/Unlock Switch: Interior

static: Short

circuit to earth

- 01134 - Alarm Horn (H12)

sporadic: no




Any ideas? Also there is a noise coming from the fuse panel. Have checked it but cannot find from where this noise coming... :(