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[Andy H]

After that I need to identify what the drain is, with my shiny new DC amps clamp meter  .  I do know the batt wasn't self draining.

Yes had heard that but my rear cig soc seems to be live 24/7.  Timer gone or something, may be connected to the leak.

I think you may be right about discharge being related to the timer. The problem is most likely to be caused be the ignition switch sticking and keeping the timer live though rather than the timer itself

[dbdb]

have just swapped out the battery with another, using my jumpstarter plugged in to the rear  cigarette socket throughout.  Works great, no powersounder, no radio, sunroof or windows to re-set.

[Kevin Wood]

have just swapped out the battery with another, using my jumpstarter plugged in to the rear  cigarette socket throughout.  Works great, no powersounder, no radio, sunroof or windows to re-set.

Then something's not right as that socket should be on a timer. Failure of said timer has caused battery drain issues in the past, so worth checking the current drain for sure.

[Marks DTM Calib]

have just swapped out the battery with another, using my jumpstarter plugged in to the rear  cigarette socket throughout.  Works great, no powersounder, no radio, sunroof or windows to re-set.

Then something's not right as that socket should be on a timer. Failure of said timer has caused battery drain issues in the past, so worth checking the current drain for sure.

Timer was not fitted on the earlier facelifts, seem to recall 2001.5 onwards. The timer arrived when the cig socket was classified as an aux port.

[Kevin Wood]

have just swapped out the battery with another, using my jumpstarter plugged in to the rear  cigarette socket throughout.  Works great, no powersounder, no radio, sunroof or windows to re-set.

Then something's not right as that socket should be on a timer. Failure of said timer has caused battery drain issues in the past, so worth checking the current drain for sure.

Timer was not fitted on the earlier facelifts, seem to recall 2001.5 onwards. The timer arrived when the cig socket was classified as an aux port.

Ahh. I assumed a 2.6 would be late enough but perhaps not..

[GastronomicKleptomaniac]

There are dedicated gadgets you can get for this purpose.

[Cliffo B]

To avoid an alarm when disconecting/reconnecting battery
I always switch on ign then switch off ign immediately
Disconnect battery within 15 secs and no alarm
Even on reconnection no alarm
Never fails

[dbdb]

To avoid an alarm when disconecting/reconnecting battery
I always switch on ign then switch off ign immediately
Disconnect battery within 15 secs and no alarm
Even on reconnection no alarm
Never fails

yes thats the recommended procedure to avoid the alarm sounding. 15 seconds is plenty provided you have pre loosened the earth terminal.  However after reconnection you still have to reprogram the auto function on each of the 4 windows and then you have to reprogam the suntroof and then you have to reprogam the radio code. My way you don't have to do any of that and you can take as long as you like wrestling with the battery earth connector and a slippy too big adjustable spanner.

[dbug]

To avoid an alarm when disconecting/reconnecting battery
I always switch on ign then switch off ign immediately
Disconnect battery within 15 secs and no alarm
Even on reconnection no alarm
Never fails

yes thats the recommended procedure to avoid the alarm sounding. 15 seconds is plenty provided you have pre loosened the earth terminal.  However after reconnection you still have to reprogram the auto function on each of the 4 windows and then you have to reprogam the suntroof and then you have to reprogam the radio code. My way you don't have to do any of that and you can take as long as you like wrestling with the battery earth connector and a slippy too big adjustable spanner.

Why not use the correctly sized spanner mate 

[dbdb]

Why not use the correctly sized spanner mate 

Wondered if anyone'd pick that up .  I've known mechanics who can just look at a nut and get the right spanner everytime.  There are also probably people who can remember the nut size of all Omega nuts.  Alas I'm not either and I wouldn't lug a tool kit to the car just to swap a battery.  Adjustable spanners must have been invented for some of us.  What is the correct size BTW?

[zirk]

Theres some fuses under the Drivers Wheel Fuse Panel that go straight to the Battery which can be adapted to stuff 12 volts back, or if you dont fancy pulling fuses fairly sure theres a 12v feed from the Battery in the Diagnostic Port Plug on the Fuse Panel, would recommend putting a inline fuse from your 12v source as well though. 

[Andy H]

Why not use the correctly sized spanner mate 

Wondered if anyone'd pick that up .  I've known mechanics who can just look at a nut and get the right spanner everytime.  There are also probably people who can remember the nut size of all Omega nuts.  Alas I'm not either and I wouldn't lug a tool kit to the car just to swap a battery.  Adjustable spanners must have been invented for some of us.  What is the correct size BTW?

10mm (& 13mm for the clamp on the base of the battery)

[Andy H]

Bahco are the only people who make a really good adjustable spanner. Everything else is only suitable for chewing up nuts on plumbing fittings.