Batter drain - Non closing MMI?

[Groke]

Since getting the car in February, I've had a battery drain. I hooked up 2 batteries but still no joy.

So, I noticed my mmi screen stays up and checking with vcds, there is a report of no control head adaptation. Thinking it was those gears, I removed the trim to find there is no housing at all for the mmi, it's been removed and the screen is somehow stuck in place. Had the battery checked, it's OK and the alternator is charging.

Would a non closing mmi screen cause battery drain? Does it have to close to turn off the feature? If so, how does one go about having a different screen from a newer system installed? I'm just looking at getting a used mechanism to fix this or get one of those modern interfaces with a new screen.

Thanks 

[Steve Q]

I'd recommend a diagnostic check to see if any fault codes flag up. 

Is it a standard mmi or an aftermarket one? Sounds like it's been messed about with and dismantling it might give you some answers. 

[Groke]

Standard MMI and screen. I've ordered the whole mechanism secondhand, when it arrives, I'll fit it back to original and see if that helps.

No battery issues, everything looks good if I drive it. Battery charges fine and will work fine all day, it's always the next morning that it struggles to start.

[Steve Q]

Keep us posted on how you get on 

[Groke]

Checked the fuses - the car was drawing 8amps without the engine on. 

Systematically going through the fuses, here were the issues;

Slot 25 passenger side - Telephone. Was drawing around 4-5 amps even though the car has no phone 🙂

Slot 21 driver's side - blank but has a 5 amp fuse in it, drawing around 1 amp. Any idea what this is?

Slot 39 driver's side - Door control front right. Not really an issue, the door was open to check the fuses.

Once I've received the MMI mechanism and fit it to the car, I'll check again. But either way, this is a huge difference already.

Let's see how it goes 🙂

Edited 18 hours ago by Groke

[Groke]

Got back in the car, after pulling the telephone fuse out. MMI comes on, I now realise I've never seen the Audi screen before, it must have been always on, and now it's stuck in a boot loop. MMI logo for 10 seconds, then black screen. MMI reset didn't help.

I'll look at it tomorrow..

Edited 15 hours ago by Groke
Typo