2007 S550 Battery issues?
08-13-2018, 04:26 PM
#1
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2007 S550 RWD Barolo Red
2007 S550 Battery issues?
Hi.
I have a 2007 S550, ~80k miles. I rotate cars I drive, so it sat for ~14 days. I go to drive it. Fob does nothing, door handles don't work. Used the key to get in, push start fires it up. But the clock resets and it acts like a dead battery would I assume (but am not sure). All the screens seem to reset at start up but then it's normal. Except the massage seats don't work. Nav took a min to load. Seems like the car did a "reboot" so to speak. I drive to work ~30mins, turn it off and same, the whole car electronically speaking is dead. It starts right up and clock does the reset again and all...
Any idea what this is? Secondary battery maybe?
I don't have voltmeter to check. Last time it was serviced like 2 months ago battery readout was good.
I have a 2007 S550, ~80k miles. I rotate cars I drive, so it sat for ~14 days. I go to drive it. Fob does nothing, door handles don't work. Used the key to get in, push start fires it up. But the clock resets and it acts like a dead battery would I assume (but am not sure). All the screens seem to reset at start up but then it's normal. Except the massage seats don't work. Nav took a min to load. Seems like the car did a "reboot" so to speak. I drive to work ~30mins, turn it off and same, the whole car electronically speaking is dead. It starts right up and clock does the reset again and all...
Any idea what this is? Secondary battery maybe?
I don't have voltmeter to check. Last time it was serviced like 2 months ago battery readout was good.
08-14-2018, 10:48 AM
#5
Super Member
Hi.
I have a 2007 S550, ~80k miles. I rotate cars I drive, so it sat for ~14 days. I go to drive it. Fob does nothing, door handles don't work. Used the key to get in, push start fires it up. But the clock resets and it acts like a dead battery would I assume (but am not sure). All the screens seem to reset at start up but then it's normal. Except the massage seats don't work. Nav took a min to load. Seems like the car did a "reboot" so to speak. I drive to work ~30mins, turn it off and same, the whole car electronically speaking is dead. It starts right up and clock does the reset again and all...
Any idea what this is? Secondary battery maybe?
I don't have voltmeter to check. Last time it was serviced like 2 months ago battery readout was good.
I have a 2007 S550, ~80k miles. I rotate cars I drive, so it sat for ~14 days. I go to drive it. Fob does nothing, door handles don't work. Used the key to get in, push start fires it up. But the clock resets and it acts like a dead battery would I assume (but am not sure). All the screens seem to reset at start up but then it's normal. Except the massage seats don't work. Nav took a min to load. Seems like the car did a "reboot" so to speak. I drive to work ~30mins, turn it off and same, the whole car electronically speaking is dead. It starts right up and clock does the reset again and all...
Any idea what this is? Secondary battery maybe?
I don't have voltmeter to check. Last time it was serviced like 2 months ago battery readout was good.
08-15-2018, 02:17 AM
#6
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2007 S550 RWD Barolo Red
Stopped by MBZ dealer. Indeed it turned out the car was still on the stock "chassis" battery. Not a bad run. It was from 2006 and completely dead, like at zero. They also tested the "starter" battery and that was weak, that one dated from 2009. My car needed an oil change, had them just take care of it. In my current situation I just don't have time right now to tinker. P&L was like ~$450 for the trunk battery, ~$250 for the starter one, if anyone is curious.
Positive note, my rear sunshade that was inop now works! And the car is much happier. It was starting to do odd stuff with the drained batteries.
Positive note, my rear sunshade that was inop now works! And the car is much happier. It was starting to do odd stuff with the drained batteries.
