Hi there. Beeing fed up with discharged battery and troublesome fob key, I’d like to remove permanently the Meta unit. Having read a few things from Abacus web site, it appears that ordering a new M300 fob won’t help as the primary key that came with the car must be fully functionnal to activate the new one. Reading further, they claim they can reset the whole system if you send the Meta M99 unit to them, and that unplugging and removal of the unit won’t impede the car to start. I guess that those of you who have track cars don’t have any use of the Meta and have it removed. Would you be kind enough to confirm and tell me if there are some extra tricks I should perform ? I have already fitted the bypass of the immobilizer, and battery is dead flat. Thank you very much.
If you already have the bypass fitted then you can simply just unplug the alarm unit from behind the dash along with the siren unit. If you do the siren will go off and make a real racket until the internal battery goes flat.
Not recommened to be upside down under the dash when that happens, or to do it late at night either 
Wrapping the siren in a thick towel helps keep it quiet(er).
[quote=AndyD]If you already have the bypass fitted then you can simply just unplug the alarm unit from behind the dash along with the siren unit. If you do the siren will go off and make a real racket until the internal battery goes flat.
Not recommened to be upside down under the dash when that happens, or to do it late at night either
Wrapping the siren in a thick towel helps keep it quiet(er). [/quote]
LOL - sounds like the voice of (bad) experience
[quote=DaveP][quote=AndyD]If you already have the bypass fitted then you can simply just unplug the alarm unit from behind the dash along with the siren unit. If you do the siren will go off and make a real racket until the internal battery goes flat.
Not recommened to be upside down under the dash when that happens, or to do it late at night either
Wrapping the siren in a thick towel helps keep it quiet(er). [/quote]
LOL - sounds like the voice of (bad) experience [/quote]
Yuup … 
I am also reliably informed hammers and buckets of water dont help that much … although it may make you feel better.
Could always use the old burglars trick of spraying expanding foam in the siren first !
Well, siren has already played for a certain time when I’ve tried to recharge the dead battery and have open the door(for a few seconds only, as the siren noise is not pleasant). I suppose that the internal battery won’t last for hours ?
You want hope so if you have any neighbours 
Jean-Yves - are you certain the battery is in good condition? If your alarm is flattening it, then I would suspect the battery first (unless you have already changed it recently).
If the battery is flat and you try to recharge with it on the car then the alarm ‘reads’ this as an attempt to hotwire the car, so the alarm sounds.
If the battery is flat and you want to charge it without the alarm activating, then you can do this by charging the battery off the car rather than attached.
Well I’ve changed it 2 years ago and the car was on CTEK during the winter which was a cold one. Unfortunately the CTEK crashed and when I realized it, battery was empty. As the fob is not working properly, I prefer to remove the alarm, beeing convinced that it uses a certain amount of electricity from the battery - and yes I know I should use the car more often
Jean-Yves - before removing the alarm it would be worth checking the battery voltage.
You should see at least 12.5v, preferably near to 13v, when it is fully charged. Any lower and the battery needs to be replaced, which is a lot easier than removing the alarm!
What is the fault with the keyfob? If it doesn’t always work - eve after changing the battery inside it - then it could be the momentary switch is dirty or has come loose. It is possible to repair those successfully.
Jean-Yves, Certainly I agree with Tlracer, that it sounds more like your car battery needs replacing , I had all the problems on my BMW Mini Cooper S , a faulty switch on interior light , and a new battery solved the alarm going off without warning ( usually a dawn , before I was awake !! 
I would defo replace the battery if it cannot charge correctly. Truth is I don’t like / trust alarms 
Thanx for your advise
Jean-Yves - let me know how you go with charging the battery.
Incidentally it is possible to replace the immobiliser unit separately, if that is already causing problems (PM me if you would like details - I’d rather not post instructions on here for everyone’s security!).