Dead Battery?
Thread Starter
Junior Member
Joined: Feb 2019
Posts: 50
Likes: 4
2019 GLC 300 4-Matic
Dead Battery?
Hi Everyone;
My 2019 GLC 300 will be in my garage without anyone starting the car for the next 2.5 months. Should I be concerned about dead battery? Any suggestions/tips are appreciated
My 2019 GLC 300 will be in my garage without anyone starting the car for the next 2.5 months. Should I be concerned about dead battery? Any suggestions/tips are appreciated
Senior Member
Joined: Apr 2017
Posts: 259
Likes: 44
From: Denver, Colorado
2018 GLC300 4matic SUV
Parking a car for that long term requires preparation. At minimum I would place the car on jackstands with the tires elevated or off the ground, and then either disconnect the battery or use an automatic trickle charger. You may also want to consider a fuel stabilizer. If jacking it up isn't feasible, inflating the tires to the maximum pressure may minimize or prevent flat spot damage.
It's far better to have a friend, family member, or neighbor drive the car every week or so while you're away, if possible.
It's far better to have a friend, family member, or neighbor drive the car every week or so while you're away, if possible.
Thread Starter
Junior Member
Joined: Feb 2019
Posts: 50
Likes: 4
2019 GLC 300 4-Matic
Parking a car for that long term requires preparation. At minimum I would place the car on jackstands with the tires elevated or off the ground, and then either disconnect the battery or use an automatic trickle charger. You may also want to consider a fuel stabilizer. If jacking it up isn't feasible, inflating the tires to the maximum pressure may minimize or prevent flat spot damage.
It's far better to have a friend, family member, or neighbor drive the car every week or so while you're away, if possible.
It's far better to have a friend, family member, or neighbor drive the car every week or so while you're away, if possible.
Senior Member
Joined: Apr 2017
Posts: 259
Likes: 44
From: Denver, Colorado
2018 GLC300 4matic SUV
Disconnecting the battery altogether would be a good idea if you have no other choice. It may still be dead when you return, but there's a better chance that it will hold adequate charge if you disconnect it.
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Joined: Nov 2012
Posts: 6,130
Likes: 1,117
A gaggle of MB's
You might be overthinking it just a bit - it's not that uncommon for a new GLC (which takes 30-45 days to come in from Germany to begin with) to be in dealer inventory 3-4 months - and they will start right up.
Pull the Keyless Go button (it pulls straight out) - which turn's off the "listening for the key drain" - and you will be fine.
Preferably a full tank of fuel before you leave....
Really you would have to be in a Siberian winter to worry...
If for any reason it doesn't start when you get back - call MB Roadside 24/7 for a quick jump - but if you pull the Keyless Go button that won't happen.
Pull the Keyless Go button (it pulls straight out) - which turn's off the "listening for the key drain" - and you will be fine.
Preferably a full tank of fuel before you leave....
Really you would have to be in a Siberian winter to worry...
If for any reason it doesn't start when you get back - call MB Roadside 24/7 for a quick jump - but if you pull the Keyless Go button that won't happen.
Thread Starter
Junior Member
Joined: Feb 2019
Posts: 50
Likes: 4
2019 GLC 300 4-Matic
You might be overthinking it just a bit - it's not that uncommon for a new GLC (which takes 30-45 days to come in from Germany to begin with) to be in dealer inventory 3-4 months - and they will start right up.
Pull the Keyless Go button (it pulls straight out) - which turn's off the "listening for the key drain" - and you will be fine.
Preferably a full tank of fuel before you leave....
Really you would have to be in a Siberian winter to worry...
If for any reason it doesn't start when you get back - call MB Roadside 24/7 for a quick jump - but if you pull the Keyless Go button that won't happen.
Pull the Keyless Go button (it pulls straight out) - which turn's off the "listening for the key drain" - and you will be fine.
Preferably a full tank of fuel before you leave....
Really you would have to be in a Siberian winter to worry...
If for any reason it doesn't start when you get back - call MB Roadside 24/7 for a quick jump - but if you pull the Keyless Go button that won't happen.
MBWorld Fanatic!
Joined: Jun 2002
Posts: 1,249
Likes: 17
From: Chicagoland, IL
09 C63
FWIW- My car was in the garage over the last Chicago winter while I was out of the country. It was not started for just over two months and sat in the crazy sub-zero cold weather. Started right up. No prep as this was a last minute departure. The tires inflation is a great idea though. Now that it's warmer, it's more likely to deform. Also, when I got back, I drove it for a couple of weeks in sport mode to get higher revs on all gears. Perhaps it helped recharge faster perhaps not - but I would think the alternator puts out more efficiently at higher revs.
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MBWorld Fanatic!
Joined: Nov 2012
Posts: 6,130
Likes: 1,117
A gaggle of MB's
I would not concern yourself about adding air before you leave - the "Extended Mobility" tires on this gen C-Class (commonly called Run-Flat) have a very stiff sidewall - and 2-3 month parking will lightly flat-spot the tread portion - but in about 10-15 minutes of driving that will even out on all the tires.
For some/very-few owners owners - where they might not have known they had a slow leak on one tire before they leave - when they get back after 2-3 months that slow leak will have dropped pressure on that one tire a couple of lbs which will trigger a low tire pressure warning light - in that 10-15 min drive the tire pressure's can be accessed thru the cluster. Again, this is a rare thing but does happen.
For some/very-few owners owners - where they might not have known they had a slow leak on one tire before they leave - when they get back after 2-3 months that slow leak will have dropped pressure on that one tire a couple of lbs which will trigger a low tire pressure warning light - in that 10-15 min drive the tire pressure's can be accessed thru the cluster. Again, this is a rare thing but does happen.
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