navreet

My 2010 GLK350 has less than 47000 miles and the battery keeps on dying. I have charged it well more than overnight, and the vehicle starts. It will start a couple of more times with that charge and then.. Poof... Dead battery. Charge it again and ditto ......

What if anything anyone could suggest I do? Thanks.

crvjim

Had the same problem with mine,took it to dealer,they checked it out seems the battery was shot,put in new one about a year ago and no more problem.

Koenig1

Verify that the GLK's charging system is working properly... Bend over and purchase a new battery!!! Sheeshhh! Some batteries last a good long time, unfortunately, your's did not...

mjhawkins2346

If your charging system is working properly this might be a bad cell. Take the resting voltage of the battery after it has been sitting for a few hours undisturbed. The voltage should be at least 12.6 up to 12.86. If it is reading closer to 11.5 to 12.0 you have a shorted cell. This happens when the lead sulphate sloughing off the cells builds up in the bottom and reaches the plates. This also happens when plates warp and touch each other.
You can get a quick read of your charging system by checking the battery voltage with the engine running. It should read around 14.5 volts. Turn on everything you can - lights, A/C etc. and it should momentarily dip and then resume 14.5 volts. If not, your charging circuit needs checking.
If your battery reads fine after charging (12.6+ )and then sinks back down (< 12.5) it's time to replace it.

107123210

Today, our dealer ran a free service clinic. 65 point inspection plus a car wash!

My GLK was too new, so took a different car.

While waiting I chatted with another guy - he had a 2010 GLK350. His car passed everything except they said the battery was weak and would not hold charge properly. He had never had a problem with it but decided to get a replacement. He showed me the estimate. It was, if my memory is correct, $436 just for the battery. I was staggered. Do these cars have some sort of special battery?

mbforlife86

We have a W210 E Class (2001) and I have always found it easier and cheaper to call MBUSA Roadside Assistance have and come change the battery at home lol. The dealer wanted $300 for the battery replacement, and the same dealer came to my home and changed it for $180. The tech who came and changed the battery said this was far more economical than taking the car in to have the battery replaced.

107123210

I have heard that they do or at least, did do that in USA. but not here in Canada.

I usually just go and buy a battery with a good warranty at battery shop About $140 last time for E320.

I was really asking if that is really what a GLK battery costs ($400+) and if so, is it something special!

rocketd55

I have a GLK 350 2010, and my battery was "low normal" at Sears when I got it tested at 38000 miles. I had a bad experience once with a previous car so I do not wait until the battery dies. I get it changed as soon as there is a hint that there may be a dying battery.

I got it changed 38K at Autozone. Autozone had a beautiful 20% off coupon online. They still do. I paid a little bit over $100 for my Duralast battery.Free installation.

If you do your research, the best batteries are either Sears Die Hard, Interstate, or Duralast (made by Interstate, but sold by Autozone). Walmart surprisingly makes an amazing battery that is also made by Interstate. Costco makes great batteries according to Consumer reports, but unfortunately they do not sell batteries for the GLK.

RICHARD HUDLOW

WOW THIS WAS VERY VERY GOOD INFO ......i WILL CALL AUTOZONE NOW.....THANKS FOR THE GREAT HELP

navreet

I also went ahead and put a new battery for around $195 from Autozone (their top Duralast battery). Ever since, I have had no issues.

420tee

I'm sure it's like everything else MB tells you, you have to use their washer fluid, their brake fluid, their tire air, etc. About 99% hooey. Before they started making cars for the commoner like the GLK only the upper crust could afford them and they didn't care that they charged $450 for a $125 battery.

ame

do you need to reset the computer after battery change?. They can do it without any special tool?

rmfnla

The only time to get a battery from a dealer is when it is covered by warranty...

bop11

Most modern cars you connect a second battery with clips before disconnecting the original. Remove the old battery and put a new one in. Connect it then disconnect the second battery. This way everything remains the same in the computers and radio and what else. 4 years is a good time on a battery. It is the discharge charge cycles and heat that kill the battery not the millage.

cindyclk

Be sure to have them do as Bop11 has said. If you don't, you will lose the window, seat, sunroof limits that you will have to reset (very easy to do but a pain in a..!). Many times your airbag light will come on also (turn wheel all the way left...all the way right and then center to reset it).

In other words...do as Bop explained!

NYCGLK

Is this so you don't have to deal with OBD emission monitoring reset, which can take a few hundred miles?

battery is more like 5-6 years old. 2010 came out as early as january 2009 with build dates at the end of 2008.

cindyclk

It's more so that you don't lose your personal settings ... limits of seats, for windows and sunroof limits...etc

as long as you go a few hundred miles after battery change before emissions inspection, there will be no issues.

mjhawkins2346

Mercedes has been using AGM (Absorbed Glass Mat) batteries which have very little acid in them since 2003 or so. They are much more expensive than an old fashioned flooded cell full of sulfuric acid you could top off with distilled water. They are also much more sensitive to overcharging. Their big benefit is packing a lot more power per pound. I found Interstate stores have the battery for a bit less than $200 which is the best I've found. Sounds like it might have aged out prematurely but that's quite possible since they are sensitive. I would charge it up and see if it holds a charge and stays around 12.6v or better. You might have a short pulling your battery down. The most likely culprit is recent stereo or custom electronics. Pull fuses to see if everything quiets down.

Sharaf

How do I know if the battery is about to die ?
I jump started someone by my car and now CD drive Unavailable ! took it to dealer, they said didn't know what's the problem and ask me to change the whole radio unit !

I don't care about the CD drive, but there is a sound peeping every few seconds that annoying me

Wondering if I replace battery this may go !?

MysticMan

Would a computer tell you, you have a problem with a battery or is it just dies silently?

ZZGlk

I have a 2013 GLK 350 with 27000 miles on it and my factory AGM battery was recently replaced under warrantee. It was losing charge whenever it wasn't being driven. It would go from 12.7 volts resting at the end of the day to 12.2 volts the next morning. Dealer did some re-programming and replaced the battery which they said was weak, but didn't solve anything. I had measured the battery with a Solar BD-7 tester and it showed 500 CCA on a 2 + year old 800 CCA battery, so it was degraded.

The battery always had 2+ amps draw on it any time I measured. After pulling on the negative lead from the battery to the ground point under the hood in order to get my clamp-on ammeter on the lead, the symptoms changed and most of the problem disappeared. Now, every once in while I'll see 12.5 volts in the morning, but most of the time it's 12.7. I didn't find any loose connections, but something definitely changed. I have been waiting for the problem to reappear, but its playing hard to get.

I did find a TSB on Alldata that talks about the MBrace system continously drawing current to try to update itself even though it's not activated. This has caused battery problems for others. Not sure this would apply to a 2010 GLK, but if my symptoms reappear, I'm going to take mine back to the dealer and see what they say about that TSB. The number is LI82-95_P-0566552. The date was 7/2013. Maybe that will help someone who has a battery draw problem.

mjhawkins2346

This earlier post (#4) is a good road map to get a sense of your battery condition with a simple voltage meter. If you suspect trouble after this, a good shop, I like Interstate but Sears, Walmart or Costco might be good, can check the capability of your battery under a high load - and you will know after that. Understand some of these places do not have AGM batteries and that's what you need for your replacement. My '10 GLK still has its original battery. I test it when I do my oil changes.

sethro1980

When I brought my 2013 in for B Service at 40,000 miles, they replaced the battery under warranty, saying it tested low. I didn't even know I had a problem. I bought the car as a CPO with about 22,000 miles on it, and it was probably the original battery. I figure this is decent lofe, considering I have a 500 watt amplifier in the rear fender for a subwoofer and a 75 watt amp under the dash for the the door speakers. The local MINI dealership wanted $330 to install a battery in her 2008 S, but we bought a Duralast at Autozone for $185 and I installed it within 30 minutes.

w5hro

This is actually a problem with the messed up German design. These vehicles regulate the battery and system to only 12.6V which is too low to sustain the battery's life for several years like in other cars. Most car batteries should last for at least 5 to 8 years if properly maintained. For whatever reason the Germans think 12.6V is where it should be, but that's incorrect. When the engine is running it should keep the battery and the system at 13.8V and that’s where the problem is because it doesn't. Again, it’s the messed-up German interpretation of what the operating voltage should be. When you first start-up the GLK350’s engine the alternator puts out just over 14V, but for only around 30 seconds or more, then the 12.6V regulator kicks in and keeps it there. The battery itself without the engine running should be around 12.6V and with the engine running it should be 13.8V to 14V and that’s where the problem is because it simply doesn’t do it.

We have a 2010 GLK350 and the batteries only last around 3.5 years max. We are already on the 3rd battery because of this design mistake. I just had to replaced it again over the weekend.
.

Joseph~

How I solved my battery issue and future battery issues.

I purchased an Odyssey battery, yes they cost more than a MB original factory battery.

Purchased from a supplier that offers "Lifetime Exchange Warranty"

This is the last battery purchase required. Exchange for a new one when not good, the only cost will be returning the original purchased battery.

I have no financial interest in Odyssey or the supplier. Am only a paying customer who will purchase again.

Joseph~