Maybe somebody has more info, but I was under the impression that there was a battery voltage monitor on these cars. If the battery got too low to start the car it would shut down everything to leave enough power to start. Perhaps that is only using the Residual Heat and Ventilation on the Climate Control.
Maybe somebody has more info, but I was under the impression that there was a battery voltage monitor on these cars. If the battery got too low to start the car it would shut down everything to leave enough power to start. Perhaps that is only using the Residual Heat and Ventilation on the Climate Control.
Not so in my experience. On the first occasion there was enough juice to make the started click, but the second time it was TOTALLY dead.....no indication of enough voltage to do anything.
somewhat related, within the first 6 month's of my w164, I used to keep a DVD in the rear player, one day I went out and the batery was dead, So I used my trickle charger I have for my boat and charged it and it started find. once it was back charged, I finally tracked down (the spinning sound) of the dvd was going even though nothing was "playing" so I learned not to store the DVD's in that player ever. haven't had an issue since, and still running on the first oem batery. I have since used the dvd, and it doesn't seem to spin now when not playing, but just in case I assure nothing is left in there when not in use.
For your information for those that don't know, I have been told by 2 MB technicians I have a second really small battery which will allow one to shift the electric-controlled transmission shift in the event the main battery is dead. I have heard nothing about this battery before. With the main battery dead (and I asssume the second battery having some charge left), you will hear a rather fast and loud pulsating beep when you open the door and you will see a lighted (I don't know the proper name) speedometer/tachometer/multifunction display. The second time Mercedes-Benz Roadside Assistance responded (my battery has gone dead 3 times so far) the technician did not have a charged portable battery pack so we had to shift the transmission to neutral so we could push the ML out of my garage and jump it with the R class he drove. If the small battery had been dead too, like the first time my main battery went dead, I don't know what they would do to shift the transmission to be able to move the car without a portable battery pack.
I have an appointment today to bring my ML to my dealer for service. I am going to leave it with them for a day or whatever it takes. And yes, I did take it to my dealer the first time the battery went dead and they couldn't find anything wrong.
I must be lucky so far. Owned since new, lamps set to auto/delay, parked outside and yes locked every time, and after going through harsh winters, my battery has never failed. I have read in the manual that there is a feature that shuts everything down if the voltage drops too low to start, but judging from the posts above, that feature is suspect. Could be that I lock it? Or that I drive 80+ miles 5 days a week? Who knows, because I am not usually on the good side of luck
I got my ML back from my dealer yesterday. They replaced an electronic module in the steering column housing they said was not shutting off when the engine was turned off. They also replaced the battery which they said did not test strong. They kept it over the weekend to ensure the battery stayed charged. I have a very good dealer!
__________________________________________________ ______________
2008 ML550, Alpine Rain, Full Ash Leather Pkg, P3, iPod Integration, Distronic, Parktronic, Voice Control, Trailer Hitch, CD Changer, Keyless Go.
My 2008 ML 63, new in November last year, with 6000 miles just suffered from a dead battery in the garage after being parker overnight. This is a daily driver and never had any other indications of problems.
The Mercedes road-side service tried to start the car from a battery pack using the under-hood terminals. No go. Finally he replaced the battery. He said that he had seen two or three that had failed, and wouldn't take a charge, at 4000 miles or so of use.
Replacement was slightly hard with some extensions needed to maneuver under the passenger seat, and a blind drop of the hold-down nuts onto bolts for the new one, but no visible damage to the carpet - just a short razor cut to free up the old battery.
I had my auxilliary battery changed last month along with the CPS and tire press. sensor under warranty.Warning light came on after 3 or 4 days of sitting but it always started.Everything is working fine now.
Or that I drive 80+ miles 5 days a week? Who knows, because I am not usually on the good side of luck
Linear Mode
