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

44,435

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 out of 1 people think this is 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 out of 1 people think this is 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
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 out of 1 people think this is 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 out of 1 people think this is 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

Add photo

Related Questions

SL-Class

Looking for a Used SL-Class in your area?

CarGurus has 2,985 nationwide SL-Class listings starting at $2,900.

ZIP:

Search Mercedes-Benz SL-Class Questions

Mercedes-Benz SL-Class Experts

#1 bobkat
bobkat
Reputation 1,230
#2 Michael Kane
Michael Kane
Reputation 400
#2 twhobie
twhobie
Reputation 400
View All

Related Models For Sale

Used Mercedes-Benz S-Class
143 Great Deals out of 6,564 listings starting at $1,200
Used Chevrolet Corvette
107 Great Deals out of 20,116 listings starting at $3,495
Used Porsche 911
91 Great Deals out of 4,519 listings starting at $11,992
Used Mercedes-Benz SLK-Class
50 Great Deals out of 1,284 listings starting at $3,250
Used Mercedes-Benz E-Class
378 Great Deals out of 21,611 listings starting at $699
Used Mercedes-Benz CL-Class
23 Great Deals out of 584 listings starting at $3,700
Used Mercedes-Benz C-Class
489 Great Deals out of 28,570 listings starting at $1,499
Used Mercedes-Benz CLK-Class
38 Great Deals out of 1,335 listings starting at $2,495
Used Jaguar XK-Series
26 Great Deals out of 710 listings starting at $4,585
Used BMW 3 Series
952 Great Deals out of 33,268 listings starting at $1,000
Used BMW 7 Series
196 Great Deals out of 5,999 listings starting at $2,999
Used Ford Mustang
380 Great Deals out of 46,804 listings starting at $1,500

Used Cars For Sale

2017 Mercedes-Benz SL-Class For Sale
476 listings starting at $86,285
2016 Mercedes-Benz SL-Class For Sale
91 listings starting at $66,900
2015 Mercedes-Benz SL-Class For Sale
90 listings starting at $50,988
2014 Mercedes-Benz SL-Class For Sale
133 listings starting at $47,995
2013 Mercedes-Benz SL-Class For Sale
5 Great Deals out of 218 listings starting at $38,980