PeachParts Mercedes-Benz Forum

PeachParts Mercedes-Benz Forum (
-   Diesel Discussion (
-   -   Kwik Question: Trickle Charger Contact Point? (

Skid Row Joe 10-05-2015 10:24 PM

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!:)

Stretch 10-07-2015 04:52 AM

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?

dieselbenz1 10-07-2015 08:32 AM

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.

TMAllison 10-07-2015 08:31 PM

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.

vstech 10-07-2015 09:38 PM

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.

Skid Row Joe 12-23-2016 07:42 PM

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!

jbach36 12-23-2016 08:34 PM

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.

shertex 12-24-2016 09:03 AM

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.

tyl604 12-24-2016 12:26 PM

Through the OBDII port? Supply power?

jay_bob 12-24-2016 12:29 PM

Only enough current to keep the ECU powered up so that it does not lose its adaptations and memory when the battery is disconnected.

tyl604 12-24-2016 11:18 PM


nelbur 12-25-2016 08:44 PM

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.

tyl604 12-25-2016 09:21 PM

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?

Skid Row Joe 12-25-2016 09:28 PM

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).

Skid Row Joe 12-25-2016 09:35 PM


Originally Posted by tyl604 (Post 3668040)
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.

All times are GMT -4. The time now is 11:05 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website