If the aux battery is bad you will get the white battery message. Start car and see what the charging volts are with a multimeter.
Sent from my iPhone > On Oct 4, 2018, at 2:55 PM, Craig via Mercedes <mercedes@okiebenz.com> wrote: > > On Thu, 4 Oct 2018 14:43:02 -0500 "Kaleb C. Striplin via Mercedes" > <mercedes@okiebenz.com> wrote: > >> It means your alternator is not putting out the required amount of >> voltage. > > > Can he put his Battery Tender on the secondary battery to bring it back > up before he replaces/checks the alternator. > > > >>> On Oct 4, 2018, at 2:40 PM, Robert Koziak via Mercedes >>> <mercedes@okiebenz.com> wrote: >>> >>> Hi All, >>> I have used my 2004 E320 w/89K sparingly for 5 years (1K per >>> year) and replaced both primary and secondary batteries 5 years ago. >>> I keep the car garaged and hooked up to a Battery Tender charger on >>> the primary battery in the trunk. Yesterday I went for a ride and >>> the red "Visit Workshop" Battery Warning Message came on. I tested >>> the electrical system at the primary battery with the following >>> results 100% charge, capacity test passed, cranking test passed and >>> charging system passed. How could I test the secondary battery? >>> Research showed that with this warning on some electrical systems >>> shut down such as the dash light at night which it did. Any >>> information would be greatly appreciated! Bob > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
