B2FiNiTY

Looking to store my GLC for around a year and I have no power source to keep a tender on it. It will be in underground parking with a car cover on.

I'm planning on disconnecting the negative on the battery and hope by the time I get back, it is not drained too terribly.

I've found one large battery in the front engine bay, passenger side. Does this car have two batteries (one for accessories and one for starting) like other benzs? If so, where is the second one?

dieseldoc

Only one battery on GLC300

Mr. J

1 batt + 1 high output capacitor. The capacitor is often mistaken for a battery.

Mr. J

There is a good chance you will wind up with flat spots on the tires and other potential issues if you leave the car this long. Can you have a friend drive it weekly? A once weekly trip that lasts long enough to get the oil up to temp will keep it in good running condition without racking up much mileage. If you can't do this then you need to research vehicle storage. There is quite a bit more that needs to be done besides just disconnecting the battery. You might want to check with your MB service advisor.

jamespaul

If you are going to be leaving your car for a year, you should sell it and buy it back later.

You would other issues including fluids deterioration (motor oil, coolant, transmission and etc.)

You may have animal intrusion, like rats and wildlife

And flat spots, like what Mr. J said

B2FiNiTY

It's only for a year. Sure, it's not good for the car but it won't kill the car.

I do this with other vehicles I have/had in the past. Air up the tires more than usual. Add fuel stabilizer in the tank. Prime the motor a few times before starting. Modern day tires / good tires won't flat spot just from sitting a year. Get a few heat cycles in them and you won't even notice.

Typically I have them in a climate controlled garage with a tender but in this case, I don't have a garage here. Just underground parking without access to a power source.

B2FiNiTY

Here's a pic of what I think is the main battery.

George in KG

I'm curious where you got the idea there is a "high output capacitor". There was a previous thread on batteries in the GLC and it seemed pretty certain that there are two.

https://mbworld.org/forums/glc-class...batteries.html

One post even has the diagram of battery location.

B2FiNiTY

@George in KG

great thread. thanks for the link!

Mr. J

Rescue card calls it a batt, it's really a capacitor. It's used for the start stop function and to enable shifting into neutral when the batt is dead.

Mr. J

I agree that the fluids will be fine. A year is more than enough time to flat spot low profile tires though. Also, I have no idea what laying dead for a year will do to any of the onboard electronics.

At a minimum, I would change the oil and top off the gas tank just prior to mothballing the car and put it on jackstands. A set of jackstands at Harbor Freight are only $100. A new set of OEM tires are about $1200.

B2FiNiTY

The tires on the GLC aren't anywhere near low profile tires though... Regardless, I've done this with my weekend sports cars with 35 or lower profile tires and so far, no flat spotting for the past 2 years. I know what you mean though, the risk is high.

Oil was just changed, gas tank will be topped off.

I don't have much a choice in this situation. Appreciate your concern. It might or might not cost me.

I am prepared to have the car towed to the dealer if when I come back, everything turns to ****.

Brew1

Just get some wheel dollies and put it on those, they are curved and will prevent flat spotting. I use them when I store my Honda S2K for the winter and never get flat spots. Like previous post, change the oil and put mouse traps around it if you can.

dieseldoc

It is not a battery just a capacitor. I had to have it replaced on my GLC due to issue with start stop. Talked to tech. No second battery.