Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 02-13-2014, 01:52 PM
USMCR O-5's Avatar
Registered User
Join Date: Aug 2007
Location: Florida
Posts: 34
Low Battery Message 2005 E320

Lately I've been getting the message in the photo below, "Low Battery, Convenience Functions Temporarily Unavailable." Along with that, the dashboard clock keeps adjusting its time. Could it be as simple as needing a new battery? And if so, which one? The car starts and runs fine, but I understand that there is a second battery in the engine compartment. Is that battery for accessories? Right now, I don't have the Comand Unit to include radio, navigation and satellite. Thanks.

Retired NYPD
Retired USMC
Life is good.
Reply With Quote
Old 02-13-2014, 03:36 PM
Registered User
Join Date: Jun 2000
Location: Plano, TX
Posts: 2,527
That message is regarding the main battery in the trunk, not the smaller auxiliary battery under the hood. The electronics are complaining the battery voltage is a bit lower than they like (even though the car starts without difficulty), so they are shutting down your heated seats and limiting the heater blower to low speed while they focus on charging up the battery.

I occasionally get this message if the car has not been driven for a few days and the morning is on the cold side (cold being below freezing). The car always starts fine, and the message clears within 5 minutes.

If the message clears after a few minutes, your charging system is likely fine. Given that you are getting this message on 62 degree days, I suspect it is getting to be time for a new main battery.
Reply With Quote
Old 02-14-2014, 12:09 PM
Senior Member
Join Date: Sep 2002
Posts: 2,567
Originally Posted by USMCR O-5 View Post
. Could it be as simple as needing a new battery?
Yup, like jcyuhn says, it's the big battery in the trunk
Reply With Quote
Old 02-14-2014, 04:29 PM
Registered User
Join Date: Sep 2004
Location: Seattle
Posts: 1,930
What is the age, and resting voltage of the battery? If it is the original then probably ready for a new one.
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra
Reply With Quote
Old 02-15-2014, 01:24 AM
Skid Row Joe's Avatar
Join Date: Oct 2007
Posts: 6,803
My 06 E320 CDI is/has been evidencing the same message. It's the main auto battery in the trunk under the false floor is the spare tire and battery, not the small, auxiliary sport battery under the hood (bonnet).

My CDI is now going on it's 3rd battery since new. Similar main battery-need schedule as my '99 E300's need frequency - about every 4-5 years.

The brains of the computer systems are always 'on' in these cars. A trickle charger may be something to consider, but I do not know that they would extend the life of a battery that is never depleted of it's charge, and used / run often.
Breitbart - One Voice Silenced, Millions Awakened

Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 04:22 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page