TheVazha

Gents,

I got the red VISIT WORKSHOP warning with a picture of a battery. I understand that it could be the aux battery. The one that's in there is original so I'd like to troubleshoot the warning by replacing it. Anyone got a source that's not going to want the blood from my veins?

Anyone got some DIY instructions, I've never replaced the AUX one...

Thanks!!

benz_addict

Does the car start fine? How's the main battery? Check your belts and worse case scenario it could be the alternator, atleast that's what it was on my friends car when the battery message came on.

pearlpower

Picked one up from Walmart. $29 and fit perfectly.

bighman

Whats the part number or certain size info I should be looking for? thx guys

grantwoodtx

Yep did the same thing

motorkas

+1

X2Board

The 14-BS AGM is the battery you need. I just replace mine at a total cost of $103. including the charger that I bought. Follow the instructions on filling the battery with acid, let it sit for 30 minutes, put the caps on and charge for 2 hours.

TheVazha

Car fires up fine. I will check the belts. I was hoping it was the alternator, thats covered and the battery is not!

I like your style. Currently searching for the nearest Walmart in 90210...

Thanks X2, I think $29 at Walmart for a plug n play sounds like a good deal!

X2Board

I don't know what battery those guys got for $29.00, the one I bought was $65 with a $9 core charge. Just make sure Absorbive Glass Mat version when you buy one.

bighman

thanks for the info guys...we have super cold winters up here and I think thats why I have been getting the same warning as others...car starts up fine etc...belts are good, so hopefully this will clear up the problem...thx again

03'55AMG

i was getting the same problem, and one day the car SPAZZED. wouldnt start, windows were opening and closing erratically, siren was blaring, and it kept calling SoS.. towed to the dealership while the siren was on (lol) and the replaced the battery and reset the ecu, good as new although the car was put on STAR and now 'cant communicate with the siren module.. they said it has its own battey (siren) and is dead and said over $300 to fix, still havent done it but im told its easy to do so thats good. hope this helps

bighman

so I found a couple at walmart.. 67.99 and 107.99.. Both were the same model # but diff brands.. Eliminator was the expensive one.. What is the diff? No one at the walmart knew...

03'55AMG

did you compare labels?

AKnight55

I have the same exact workshop message right now.. The car has been in storage for 2 months, so it wont get fixed till the end of winter.. Let me know what you did to clear the message..

03'55AMG

put the car in service mode and read the voltages running and not running. should be 12.3+ not running and 14.0+ running. or even take it to autozone and pull the codes and test the alt, free i think for both too

bighman

ah the expensive one was sealed from the factory...no need to add acid

timeskew

After getting the same message, ignoring it a few days caused my accessories to shut down. No A/C and no COMAND, but that wasn't the end. Next day the valet comes up to me and says "Your car won't start." Great.

First I checked the altenator first at AutoZone for free. Tests came back fine. I bought a charger, and set it to "trickle" charge the battery in the trunk near the spare. After a few overnight charges I went a week without any extra care and no battery service indicator. This was over a year ago, but I still ride with the charger and 100' extension cord right above the spare for good measure.

guysandiego

i had this -- I bought 1 battery -- then the next -- then found out the alternator was the culprit--- you may want to use dyno mode and check the alternator before you start switching batteries.... but on the other hand -- the batteries are due anyways -- but its a heartbreaker -- buying a battery and the next day the warning reappears.

novae500

where is this aux battery located? I'm guessing i should charge it or get a new one?

Over the weekend i left the headlights/fog lamps on and next day nothing drained the battery completely. Went and got a new battery (group 49)for the one in the trunk $150.

TTMotorsports

You will need to test the amperage output of the alternator. Just because the voltage is reading correctly doesn't mean that the amperage is correct. There is a good chance that even replacing both batteries won't correct this problem for the long term.

If the BCM in the trunk got wet or shows any sign of corrosion on the plug or harness could also cause this issue.

Process of elimination but check the amp output of the alternator before replacing anything!

03'55AMG

TTM, how would you check the ports in the bcm? does the cover come off?

TheVazha

Just checked the main battery and the alternator, both check out fine. The 14-BS is $65 at AutoZone and you have to fill it with acid and go through the process. I'm not down.

Can anyone post a link to a supplier that has the battery plug n play mode? Also, please post DIY. I tried to locate the battery today and couldn't find it...

Thanks guys!

03'55AMG

its in the trunk under the lining

bighman

I'm In Canada and got it from here www.Saskbattery.com and it was 60 shipped in Canada... Not sure how much it would be in USA. It's a sealed unit too

Jdub55

I got this message not too long ago as well. My car was parked for about 3 weeks or so. At first I was worried but after the car idled for a bit the message went away. So I drove it around for about 30 minutes and parked it. Then I started it up again the next day and no warnings. So now I just make sure I at least drive it once a week during the winter.