LairdScooby

Wedding

You're correct if the car has the correct battery fitted which could in fact be part of the problem. If someone has previously changed the battery and not fitted an AGM battery, the stop-start will hammer the life out of a standard lead-acid and cause excess sulphation, drastically reducing the capacity of the battery. However, if the battery is fully charged and not even the interior or hazard lights will work, it's pointing towards an earthing problem somewhere, rather than fuses. That said, it could be a duff battery and an earthing problem..............

How soon after taking it off charge did you test that voltage? That could still be a dead battery.

I'd strongly advise getting the battery drop-tested by your local auto-electrician. That's showing about 60% charge at 12.4V, i would expect more to be honest if it hadn't turned over. This suggests the battery has lost its capacity to deliver current but the only way of doing it is to either get it drop-tested or measure the voltage while trying to start.

At what point did you measure the 12.4V on the battery? When you first took it off the car or what? Also have you measured the battery voltage while trying to start?

A few things come to mind, first is what fluid did they use in the gearbox? Second, what condition is the battery in? If the battery is not holding its charge that well, it can cause spurious faults on the gearbox ECU and other ECUs as well. The clue here is that it happens after a cold start, when there has been the most load on the battery to start it. By the time you've started it for the third time in the day, the battery would (or at least should) have enough charge to cope with a warm start without dropping the voltage enough to cause a spurious fault. As you might guess, my thoughts are directed at the battery being at fault here! Recently on my S Type, i hadn't used it for about 3 weeks and when i started, it came up with "Auto Gearbox Fault". I ignored it for a few miles, then hit the clear button and it went off and stayed off - hasn't returned since so i'm assuming that it was just a low battery. Sometimes it will also try and tell me a tail or brake lamp (sometimes both on both sides!) have failed as well if i haven't used it for a couple of weeks.

Legless

Skate

Expensive

Arm

Border

Space

Grace

Curry

Savoury

Chestnuts

Hot-spanner

Squeeze

Spaghetti

Dictionary

Roll

Bottom

Checkmate

Warlocks

Curse