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  #1  
Old 10-05-2015, 10:24 PM
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Kwik Question: Trickle Charger Contact Point?

06 E320 CDI

Where do I hook up a trickle charger on this particular MB diesel model?

I'll be storing my CDI for up to 6 - weeks at a time, and I don't want to unhook the batteries every time.

Part B): Is there ONE contact point that will keep BOTH CDI batteries on the one trickle charger?

Thanks for any experience / expertise with this MB diesel model with (2) batteries on-board!
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Old 10-07-2015, 04:52 AM
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It doesn't look like anyone knows!

I can't help either though there was a thread started by either shertex or Kartek (I think) a few months back about W210 batteries and how a trickle charger can cock up the electronics (possibly a post by whunter) =>

Could I be more vague?

What does the book say?
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  #3  
Old 10-07-2015, 08:32 AM
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Well I know when the ignition key is turned off the BCM isolates both batteries. Since the auxillary battery is used for brakes only I wouldn't really worry about it loosing a charge in 6 weeks.

The SAMs are fussy as my neighbour found out after his son gave a friend a boost and blew one. I understand your concern and I would visit the dealer and ask about using a trickle charger vs a battery tender.
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Old 10-07-2015, 08:31 PM
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Why worry about 90 days? Is there something fouled up that wont turn off?

I start my 300D once a year. I pull the neg cable, reconnect it and it fires right up.
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Old 10-07-2015, 09:38 PM
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Hmmmmm. I wouldn't be concerned with keeping up the aux battery. Once you have verified the model trickle charger you have will be safe on your vehicle, I'd just keep the main battery peaked.
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Old 12-23-2016, 07:42 PM
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What models are ppl here using as battery tenders?

Also, will the battery tender work by pushing it in the front seating area ashtray / rear seating area, OR the trunk auxiliary DC plug-in??

I priced one out @ the MB dealer and the cost was like $200.00!
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Old 12-23-2016, 08:34 PM
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Forget a trickle charger. Get this instead........

Look up on YouTube what Kent Bergsma said about battery chargers. He was recommending a Ctek Smart Charger with a reconditioning cycle, that pulsates electricity charges and knocks some of the sulfate off the batteries.
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Old 12-24-2016, 09:03 AM
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I use a Battery Tender Plus. Haven't had the occasion to use it yet on my CDI, but other CDI owners assure me it will work fine.

On a related topic....hadn't worried before about completely disconnecting power from the car. On the W210 it's simply a matter of resetting steering angle sensor and resynching windows. But there's a lot more going on in a newer car. So Bergsma recommends using an adapter than enables you to keep 12v applied to all the electronics through the OBD port when disconnecting the battery cables. Assuming that such a procedure is perfectly safe, seems like the way to go.
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Old 12-24-2016, 12:26 PM
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Through the OBDII port? Supply power?
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  #10  
Old 12-24-2016, 12:29 PM
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Only enough current to keep the ECU powered up so that it does not lose its adaptations and memory when the battery is disconnected.
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Old 12-24-2016, 11:18 PM
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Interesting.
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  #12  
Old 12-25-2016, 08:44 PM
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Trickle charger usually means a small amp, dumb charger, that might kill your battery over time. What you want is a smart battery maintainer that periodically checks your battery for charge, provides a higher charge voltage until it is charged up, and then uses a low float charge of only about 13.4 volts to maintain the full charge. I would hook it to the main battery. Not sure if the brake battery will be maintained or not, but it seems like it should.
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  #13  
Old 12-25-2016, 09:21 PM
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I have an 1981 300SD so I have never heard of a brake battery. What the heck is it for; how does it work with the brakes? Do all cars have them now?
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  #14  
Old 12-25-2016, 09:28 PM
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Excellent points, nelbur.

The 06 CDI has the SBC (Sensonic Brake Control), necessitating the 2nd auxiliary battery located in the engine compartment under the cabin HVAC, fresh air filter & intake, on the passenger side nearest the firewall.

*Q: Will the CDI's auxiliary DC plug-ins all accept and charge the main battery? There's 4 plug ins; front ashtray (1), rear seating area ashtray (2), trunk cavity (1).
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  #15  
Old 12-25-2016, 09:35 PM
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Quote:
Originally Posted by tyl604 View Post
I have an 1981 300SD so I have never heard of a brake battery. What the heck is it for; how does it work with the brakes? Do all cars have them now?
As far as I know, only the SBC (SensonicBrakeControl) (Mercedes patented I think) years of Mercedes. That was short lived in years. The SBC anti-lock brake system uses the aux. battery, and the main battery as a backup. If my observation of mine going bad is accurate.

If you want to see what SBC does, there's at least one YouTube illustrating what it does, and how it is superior to anti-lock brakes. In effect, SBC is individual anti-lock brakes on each wheel.

The SBC battery is the size of and the same as a big motorcycle battery. I bought my replacement at NAPA. A Nippon/Chinese 12Volt - is just fine.

We 05 and 06 - I6 fixated MB E320 diesel buyers, will put up with the $1,500.00 +/- cost of a complete SBC system replacement, to not have to get the later W211, V6 Bluetec configuration.

Last edited by Skid Row Joe; 12-25-2016 at 09:47 PM.
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