SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

Battery voltage menu on 2009 SL63?

Old Oct 15, 2023 | 06:07 PM
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2009 E550
Battery voltage menu on 2009 SL63?

Hi everyone,
I tried to search but I can't seem to find an answer. How do I access the menu on my 2009 SL63 AMG on the dash that will show my battery voltage?

My situation is, the car was parked for 45 days, went to take for a spin, it started (I could tell it struggled) and drove it for about 20 minutes, ran into a store and came out, and would not start. I got a jump, it started immediately, and now am home after driving around for another 45 minutes to hopefully charge the battery. I don't know if its the starter battery or the alternator. The car only has 30k miles on it.

thank you all in advance for any insight
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Old Oct 16, 2023 | 10:42 AM
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Wrong forum, please try this one: https://mbworld.org/forums/sl-class-r230-17/
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Old Oct 18, 2023 | 05:45 PM
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2005 R 230 SL350 (M112 3.7). Sold the 1966 W113 230SL recently
Turn key in accessories position.
In right display toggle to ambient temperature or speed.
Push reset stalk between the dials 3x.
Voltage shown.

You can toggle to other info.

With key turned to next step (don't start engine) you can read quantity of engine oil.

Whatever is on display will remain there, showing live data, when you take a ride, until you toggle again.

Much simpler for reading voltage: put a usb plug with voltage display in the cig lighter.
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Old Oct 18, 2023 | 07:03 PM
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2009 E550
Originally Posted by Frederick NL
Turn key in accessories position.
In right display toggle to ambient temperature or speed.
Push reset stalk between the dials 3x.
Voltage shown.

You can toggle to other info.

With key turned to next step (don't start engine) you can read quantity of engine oil.

Whatever is on display will remain there, showing live data, when you take a ride, until you toggle again.

Much simpler for reading voltage: put a usb plug with voltage display in the cig lighter.
Thank you, I will grab the usb voltage reader, will this show for theqin battery in the trunk or the starter battery? Sprry for all the stupid questions, just rying to figure stuff out as going to the dealer is bankrupting me
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Old Oct 19, 2023 | 05:06 AM
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Frederick NL's Avatar
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2005 R 230 SL350 (M112 3.7). Sold the 1966 W113 230SL recently
The rear battery feeds the cig lighter in the ashtray, because it feeds everything except the starter motor (and some back up stuff that you don't mind here/now).
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