Right..... changed the air suspension, level sensors and a door lock this weekend followed by the resealing of the sunroofs / dropped and refitted headlining on Monday. All seemed OK but obviously the doors were left open most of the two days. The vehicle wasn't started albeit to test the air suspension job integrity on Saturday, then switched off. Went to start it Monday night - dead. Dash lamps work / go off as normal just a click from the starter. Radio not lit and clock fades out as key is turned to start position.... although the lights and sunroof motors work. 
Almost as if it was immobilised.
Put a booster charger on the battery this morning and it was quite low (10A+ showing on the meter) so left it a few minutes to charge. After a few minutes a vibrating noise pulses starts (like an ABS pump, but not) from down in the engine bay. Didn't like the sound of that so disconnected the charger and panicked that I've fried something. Still didn't start. I had an issue with a key recognition induction coil on another car so searched out the spare key; took about 20mins. Put the key in and it started perfectly. So tried the original key.... perfect start. Ran the engine for 5 minutes and all seemed fine. Took it for a test round the block, stopped the engine then dead again - both keys.
Methinks battery is goosed.... but what are the risks in battery change on this vehicle and can I boost start it - what was the component that made the noise when I did? Can I remove the old battery and charge it overnight without the electronics failing? What battery to fit (spec) and what precautions to take....... any help please!!
Thanks in advance,
Steve.
Almost as if it was immobilised.Put a booster charger on the battery this morning and it was quite low (10A+ showing on the meter) so left it a few minutes to charge. After a few minutes a vibrating noise pulses starts (like an ABS pump, but not) from down in the engine bay. Didn't like the sound of that so disconnected the charger and panicked that I've fried something. Still didn't start. I had an issue with a key recognition induction coil on another car so searched out the spare key; took about 20mins. Put the key in and it started perfectly. So tried the original key.... perfect start. Ran the engine for 5 minutes and all seemed fine. Took it for a test round the block, stopped the engine then dead again - both keys.
Methinks battery is goosed.... but what are the risks in battery change on this vehicle and can I boost start it - what was the component that made the noise when I did? Can I remove the old battery and charge it overnight without the electronics failing? What battery to fit (spec) and what precautions to take....... any help please!!
Thanks in advance,
Steve.
