[W126 Coupe] Battery for 560

[Dan Landiss]

I concur with the others that Interstate batteries are just fine. Have 
you considered that the problem may be the charging system, not the 
batteries? The required charging voltage varies with temperature, but 
from a 0°C cold start 14.5 to 15.o VDC is not excessive. As under-hood 
temperatures rise that should fall to around 14 VDC.

Charts here: <http://landiss.com/battery.htm>.

The voltage regulator for your Bosch alternator is part of the brush 
assembly and can be separately replaced. You should be able to find one 
rated at the correct charging voltage. Owners of Escort radar detectors 
might note that your display can often be switched to read battery voltage.

on 5/3/2011 1:05 AM Robert Karl Stonjek wrote:

> What's the best battery for a 560SEC (euro, higher compression)?

> The last two batteries in my car do not appear to have been adequate, 

> the original (on purchase) being Bosch BDIW65I with CCA of 550 and RC 

> of 105.  That battery was hopeless.

> I had it replaced with a Century DIN 85L with CCA of 600 and RC of 

> 135.  This is a bigger battery but it only lasted 5 years and is now 

> gone, but it never really cranked the motor over fast enough in my 

> opinion.

> The owner's manual suggests a 91A/h battery.

> Online battery selectors suggest DIN 88 or DIN 100.  The battery 

> should be no more than 350*175mm by my measurement.  It could be 

> taller than 175 (current battery height), but no more than around 200mm.

> Batteries I've seen online include the Federal 649MF (900CCA, 100A/h, 

> DIN95) but they are hard to get and expensive in Oz.

> The Dekor 58515 (DIN88L) looks good (CCA 750, RC 165) but it is 

> expensive ($70 more than the battery I last purchased plus I have to 

> pay freight of $50 to get down to where I live ie it is not available 

> locally).  This is a 'maintenance free' battery.

> The main physical difference between DIN88 and DIN100 is 19 verses 21 

> plate construction (outside dimensions can be the same depending on 

> manufacturer).

> It looks like DIN100 is the best option, but what brand and where can 

> you get them from (in Oz).  I suppose the low compression cars (9:1) 

> don't have so much of a problem with cold cranking (CCA) as the higher 

> compression (10:1) euro version.

> And another problem you probably don't have ~ hitting kangaroos.  I 

> hit one at 140kph a few days ago.  It hit on the lower right hand 

> (driver's) side bending the bumper bar and destroying the fog lamp but 

> doing no other significant damage.  The roo was killed outright and 

> was in very messy condition.  Had I been going slower it would have 

> had time to put in another hop and would have been caught right in the 

> middle of my grill, probably leaving the car undrivable and very 

> expensively damaged.

> Not quite sure how I'm going to straighten the bumper (is bent 

> downward, maybe a couple of cm ie an inch).

> Robert

>

>

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