I DON'T DRIVE THE 1999 SL500 MUCH SO WHY IS THE REAR BATTERY DIES ON ME AFTER NOT RUNNING THE ENGINE FOR ABOUT 10 DAYS PLUS?

Asked by May 17, 2016 at 03:09 PM about the 1999 Mercedes-Benz SL-Class SL 500

Question type: General

I TRY TO RUN THE ENGINE FOR AROUND 10 MINUTES EACH WEEK ALL
YEAR ROUND BUT WHEN I FORGET AND TRY IT AFTER SAY 2
WEEKS,THE BATTERY ALWAYS DIES-WHAT CAN I DO,AND SECOND-HOW
LONG THE LIFE OF THIS BATTERY? I HAVE 57,000 MILES .THANKS FOR
THE HELP.

12 Answers

51,885

Put a battery maintainer on the battery. Running the engine for 10 minutes each week does not supply the battery with enough charge. Do a Google search for "Deltran Battery Tender" and order one.

1 of 1 people found this helpful.
70

I have the same vehicle(60k miles)...I use a battery MINDR(model 1510) 12 volts...works PERFECTLY(thanks to help from this forum and oldtimer) http://www.batteryminders.com/12-volt-maintenance-charger- desfulator-with-warranty

1 of 1 people found this helpful.

Thank you Carol...So many brands out there-how does one know which is a good one?

70

I have the Battery Mindr on my 1990 BMW 535i AND my 1999 Mercedes SL500...both work PERFECTLY...I hope this helps! On your 99 SL500...connect the battery mindr battery clips to the battery(which is on the right side of your trunk)...then attach the cord out your trunk and plug it into your electric wall socket(when removing- always remove the plug from the wall socket FIRST)

Best Answer Mark helpful
70

There is a cover pad on top of the battery in the trunk...you should see two round white release knobs(u can google it if you have trouble). Battery Mindr does come with instructions(if I can do it...anyone can)

70

when u have your trunk open....look near the corner and u will find a groove...which is where the cord exits so you can plug it into a wall.

Carol-do you leave the trunk door open during the charge in order to minimize smell/heat?

70

I don't(there is a little groove that your cord can fit through around the rim of the trunk)...and u can close your trunk)...I live in AZ and it can be 120 in summer here. Someone here was nice enough to help ME with this so I am happy to pass this info along to you...btw this is the BEST Mercedes SL ever made imo

1 of 1 people found this helpful.

Thank you,once again.I appreciate the info,and i'll be sure to help others with it,as well. I live in Co,and i think i'll leave the trunk door open,the temps won't affect anything by doing so(my opinion). Perry.

70

you do NOT have to keep your trunk open(in fact it will try to close automatically) On the LEFT side of the trunk(where the SL500 emblem is) you will see a groove where u can slide the cord to the outside of the trunk Let me show u a pic

1 of 1 people found this helpful.
70

Can't seem to be able to download a pic

Can you kindly email it to me?My address is:MOEY8105@GMAIL.COM. Thanks,Carol.

Your Answer

SL-Class

Looking for a Used SL-Class in your area?

CarGurus has 2,887 nationwide SL-Class listings starting at $4,500.

ZIP:

Mercedes-Benz SL-Class Experts

  • #1
    bobkat
    Reputation
    1,310
  • #2
    twhobie
    Reputation
    460
  • #3
    Michael Kane
    Reputation
    440
View All

Related Models For Sale

Used Mercedes-Benz S-Class
169 Great Deals out of 5,633 listings starting at $2,000
Used Mercedes-Benz E-Class
471 Great Deals out of 19,709 listings starting at $1,400
Used Mercedes-Benz SLK-Class
60 Great Deals out of 1,184 listings starting at $2,995
Used Porsche 911
130 Great Deals out of 4,974 listings starting at $8,900
Used Chevrolet Corvette
289 Great Deals out of 20,736 listings starting at $2,990
Used Mercedes-Benz C-Class
589 Great Deals out of 25,389 listings starting at $1,995
Used Mercedes-Benz CL-Class
25 Great Deals out of 492 listings starting at $2,995
Used Mercedes-Benz CLK-Class
44 Great Deals out of 1,143 listings starting at $1,750
Used BMW 3 Series
1,121 Great Deals out of 32,630 listings starting at $1,000
Used BMW 7 Series
145 Great Deals out of 5,852 listings starting at $2,500
Used BMW M3
41 Great Deals out of 1,718 listings starting at $5,995

Used Cars For Sale

2017 Mercedes-Benz SL-Class For Sale
196 listings starting at $73,795
2016 Mercedes-Benz SL-Class For Sale
51 listings starting at $54,999
2015 Mercedes-Benz SL-Class For Sale
10 Great Deals out of 125 listings starting at $49,991
2014 Mercedes-Benz SL-Class For Sale
5 Great Deals out of 178 listings starting at $49,483
2013 Mercedes-Benz SL-Class For Sale
168 listings starting at $38,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.