Removing battery to maintain it - Page 3 - Mercedes-Benz Forum
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post #21 of 30 (permalink) Old 03-07-2019, 08:14 AM Thread Starter
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OK understood. Thanks for the input everyone!
Ollie
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post #22 of 30 (permalink) Old 03-07-2019, 06:19 PM
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Another approach that is considerabley more straightfoward would be to get a Battery Monitor. I purchased a Battery Monitor from the Google Playstore for my Android phone. It is was listed as a BM2 monitor. It works quite well. It is a device that attaches to the battery and transmits via bluetooth the status of my pattery. Voltage, Cranking voltage, Charging test, and has set points for notification if the battery is out of usable range. It keeps a history of readings, too. I get a status update twice per day. Paid about $35 for it. It gave me notice when I needed a battery replacement. Futher, you could use it to notify you to go to the garage and run your car for a period of time to recharge the battery. Last, a drained battery causes a severe shortening of overall battery life. Keep it topped off.
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post #23 of 30 (permalink) Old 03-08-2019, 12:20 AM
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Thanks Kraut, I didn't even think about the Cig Lighter off without Ignition, but irrelevant as he was thinking of OBD Plug In, but that circuit likely has an even lower Amp fuse so it still has one helluva risk to it

The easiest option is to go down there once every 2 weeks, start the Car and run it with your foot on gas pedal at a fast idle, say 1200 - 1500 rpm until the Cooling Fan kicks in, thhen give it a rev or 2 so it hits the 4000rpm limiter to blow the exhaust out, switch off and leave it for another 2 weeks.

If it's a nice day with no salt on the roads drive it around the block instead !!

That is all I do with mine right now, until it is finished.

HTH,
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post #24 of 30 (permalink) Old 03-08-2019, 04:28 AM
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I like the "fire it up every two weeks" plan*.

Or the "slip the maintenance guy $20 so he ignores my extension cord once every two weeks" plan.

*Not the best for the engine, but allows battery charging, engine oil to circulate, hydraulics/airmatic to be pressurized, interior to get fresh air, trans fluid to circulate.
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post #25 of 30 (permalink) Old 03-08-2019, 04:52 AM
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Yeah, that's why I keep it at fast idle and get it right up to temperature, and blow the exhaust clear before switching off, I will also change the Oil and Filter once the Paintwork is finished and she is back on the road

Like I said, if it's a clear day, no salt around I have been taking it out with "Trade Plates" on for a 10 - 15 mile run to clear any moisture.


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post #26 of 30 (permalink) Old 03-14-2019, 07:11 AM Thread Starter
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Sorry to bring this up again
I was in WIS yesterday, reading about retrofitting illuminated door sills. In the instructions it says prior to disconnecting the battery, attach a device that maintains current. Does anyone know what device the dealer would use?
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post #27 of 30 (permalink) Old 03-14-2019, 11:18 AM
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Hi Ollie,

I have no idea, probably the same idea as I do, a slave Battery of some kind. Don't quite understand what the advantage of that would be when doing a retro fit why bother disconnecting Battery anyways, just disconnect the circuit involved !!!!

Unless of course the Dealer Technicians are likely to short something out, (oh wait ) .................. In which case slave power is useless as well..........

Phut !! Bang!! Dead !!

And how long does it take to do the retro fit ...............

Couple of hours ??

Certainly not 3 weeks

There is no such thing as a free lunch, you are wasting your time looking for a cheap or easy short cut

The sensible answer is don't leave it more that a couple of weeks or use a Smart Battery Maintainer

HTH,


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Last edited by Dave2302; 03-14-2019 at 11:21 AM.
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post #28 of 30 (permalink) Old 03-15-2019, 06:17 AM Thread Starter
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Thanks as always Dave. I spoke to the janitor this morning and he's going to let me plug in again tomorrow for the day.

They have been building a new condo on our street for the past few months, so now that the snow's gone I have to deal with shitty cement water. AND they just started to build another two condos. So I think snow is now the least of my worries!
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post #29 of 30 (permalink) Old 03-15-2019, 07:08 AM
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Quote:
Originally Posted by oliverp View Post
Thanks as always Dave. I spoke to the janitor this morning and he's going to let me plug in again tomorrow for the day.

They have been building a new condo on our street for the past few months, so now that the snow's gone I have to deal with shitty cement water. AND they just started to build another two condos. So I think snow is now the least of my worries!
So, it seems clear - your best investment is in a relationship with your janitor.

IF he lets you plug this in, you're all set.

Find out if he likes coffee...and bring him a fresh cup. Fresh baked goods are always appreciated...

You get the idea.
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post #30 of 30 (permalink) Old 03-15-2019, 07:09 AM Thread Starter
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Good idea. I will look after him, thanks!
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