SL/R230: REAR BATTERY CHARGING
Thread Starter
Senior Member
Joined: Oct 2021
Posts: 493
Likes: 101
From: Benton, Louisiana, USA
SL 500 2004, Ford F-150-2014
REAR BATTERY CHARGING
R230-ENTHUSIASTS:
WHAT WOULD BE THE BEST APPROCH TO CHARGE THE REAR BATTERY...
1.-DISCONNECTED
2.-CONNECTED
AS ALWAYS THANKS FOR YOR WISE FEEDBACK
WHAT WOULD BE THE BEST APPROCH TO CHARGE THE REAR BATTERY...
1.-DISCONNECTED
2.-CONNECTED
AS ALWAYS THANKS FOR YOR WISE FEEDBACK
Joined: Nov 2016
Posts: 7,847
Likes: 3,496
From: Maryland
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
I always left mine connected using a CTEK charger and had no problems. Others may disagree.
Super Member
Joined: Jul 2007
Posts: 742
Likes: 228
From: Santa Barbara, CA
S550C4, Porsche Cayenne
Leave it connected. I have my C-Tec (MBZ) charger wired so I can plug it in without removing panels. I trickle charge it when it's perked in the garage. Works great that way.
Joined: Nov 2016
Posts: 7,847
Likes: 3,496
From: Maryland
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
I would strongly recommend CTEK as they make the Mercedes-branded chargers. The MXS 5.0 is under $100. Please don't go cheap. Your car may be old, but it is still a highly sophisticated piece of electronics.
Trending Topics
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Joined: Nov 2016
Posts: 7,847
Likes: 3,496
From: Maryland
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
It's worth checking the health of the front (starter) battery from time to time. When they go out, it is sudden and without warning, like stopping for gas and then the car doesn't start. The rear battery is not used as backup for the starter battery.
Super Member
Joined: Jul 2007
Posts: 742
Likes: 228
From: Santa Barbara, CA
S550C4, Porsche Cayenne
I would strongly recommend CTEK as they make the Mercedes-branded chargers. The MXS 5.0 is under $100. Please don't go cheap. Your car may be old, but it is still a highly sophisticated piece of electronics. https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
