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  #1  
Old 01-31-2011, 09:53 PM
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560 SEL Alternate alternators?

Is the 80amp alt specific to the 560 or is there some cross-compatibility. The setup is pretty basic after all. Higher amperage would be nice. But when I go rebuild shopping I want to know if I can use others designated for other Benzs.

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Old 01-31-2011, 11:25 PM
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Does it use a serp belt or v belts?

I'm amazed the 560 came with a wimpy 80 amp unit when it had a big stereo, heated seats, and all the other toys to run. I have a 110 amp unit waiting to go in place of the 80 amp on my car now.

-J
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1991 350SDL. 230,000 miles (new motor @ 150,000).

2013 Fiat 500E. 20,000 miles, 80 miles at a time.
2012 Passat TDI. 95,000 miles. More space, power, and fuel economy than the Benz
2004 Touareg V10 TDI. 150,000 miles. One of 450.
1999 Jetta TDI. 310,000 miles.
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1991 Jetta ECOdiesel. 430,000 miles. 1 of 700. Sold to VeeDubTDI, totaled in front of our house
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  #3  
Old 01-31-2011, 11:28 PM
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V belt. And I know what you mean. 80 amp is nothing and its not like other cars of the same vintage came with similar. Other cars easily came with 100+. Also not to mention that with age they degrade. Mine is putting out 13.9v at battery. That has me a little concerned that amp output is also down.

But since its a standard "swing arm" mount I would think others would either go right in or go in with little modification. At least I hope.
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Old 02-01-2011, 02:51 AM
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Waiting for his Model 3..
 
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is that 13.9 at idle? That's not so bad. My Audi came with a 110A, and my 91/92 Jettas had 90amps, and those cars cost almost 4 times less then the SDL

There's an upgraded bosch alternator used on some Saab cars the 85 and older diesel guys upgrade to, perhaps that would fit your V8?

-J
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1991 350SDL. 230,000 miles (new motor @ 150,000).

2013 Fiat 500E. 20,000 miles, 80 miles at a time.
2012 Passat TDI. 95,000 miles. More space, power, and fuel economy than the Benz
2004 Touareg V10 TDI. 150,000 miles. One of 450.
1999 Jetta TDI. 310,000 miles.
1992 Jetta ECOdiesel. 156,000 miles. 1 of 48. Sold.
1991 Jetta ECOdiesel. 430,000 miles. 1 of 700. Sold to VeeDubTDI, totaled in front of our house
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  #5  
Old 02-01-2011, 08:09 AM
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Seems like there's a few old threads circa 2003-2004 on here on the mods necessary to do a 110 amp (maybe even a 140 amp) alternate. Took a little work, but not bad. It was something i had considered when i had the 560sel.
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Old 02-01-2011, 12:50 PM
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I think the AL129x alt will work based on the info I found. 115amps. From a Saab. Appears to be a direct fit. Another upgraded to 130amp, but had some slight mods to do because the pulley was too far out.
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1991 560 SEL / 185k miles
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Old 02-01-2011, 12:51 PM
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Thread:

"Alternator" 115 Amp Bosch AL129X works in 123s!
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Old 02-04-2011, 11:29 AM
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I think all the frames are the same- just have to swap the pulley.

There are lots of ppl running the 110-143 amp and the 150 amp models.. on v-belt cars(up to 2001Alternators).
Used they are $50-125. Most ppl throw a new regulator/brush pack on the alt which is another $30-35. You can do bearings too for another $20. Rears seem to get a bit noisy- and it's the cheaper brg.

You have to make a new harness for the wiring- need switched power source and then bigger cable to take the power.


M
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Old 02-04-2011, 11:12 PM
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The Saab version fits, just the case has to be rotated 180 from when I test fit it a while back.

I do not see how you can get away with much more amperage with a skinny, single V belt.

Regardless, 115A > 80A.

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