Installed a 143A alternator in my W124 (86-95E-class) - with photos - Page 3 - PeachParts Mercedes-Benz Forum

hardcharger · #1 02-09-2009, 02:47 AM

Thanks for the mod information. I just installed a 143A alternator on my 1989 300CE and it works great. I can run my heater blower, defrost, headlights, stereo at idle no problem. I ended up two strands of 4ga wire 60" long with one strand 16ga as recommended. Using the stock distribution block was easy; I placed one 4ga wire on each of the two posts. The pulleys were easily switched using an impact wrench as previously mentioned.

Great mod, purchased the alternator on ebay for 115. Wire and terminals cost me $40 at a local stereo store. Took approx 3 hours of work to prepare then install, and I changed the serpentine belt as well.

Thanks again for the information!

michakaveli · #2 02-09-2009, 09:56 AM

This upgrade would sure be great on my w210. The defroster drops voltage. I think my stock alt is rated for 70 or so amps. WEEAAKK!

gsxr · #3 02-09-2009, 11:25 AM

Hardcharger, glad to hear your upgrade went smoothly!

michakaveli, the same upgrade should work on your W210 also...

volosong · #4 07-06-2009, 11:27 AM

An old, old thread. Just wanted to give an update. I had my mechanic perform the 143a alternator "upgrade" to my '89 300CE about six or seven years ago now. Can't remember exactly because it has been working flawlessly since being done. No issues at all...absolutely none! Can't remember if the cable was replaced or not. I'd have to check the mechanic work order.

gsxr · #5 07-06-2009, 01:11 PM

Same here. I've had the 150A upgrade on my cars for years now, with zero problems.

iwrock · #6 09-16-2009, 06:15 PM

I have been running a 150amp alternator in my 300TE thanks to Dave for about 3 months now.

Cranks out 13.4 volts with everything on, and stereo blaring.

Thanks!

Ramblin · #7 09-20-2009, 08:42 AM

I have a Saab 115amp alternator in my 83 CD with 4 large amps @330 watts RMS each and I have no trouble burning up my passengers hearing.

Gravedigger · #8 01-16-2010, 08:02 PM

Will this alternator fit on a 190D?? Thanks

gsxr · #9 01-17-2010, 11:16 AM

Quote:

Originally Posted by Gravedigger

Will this alternator fit on a 190D?? Thanks

Yes. You may need to re-clock the alternator (depending on what donor you use), and you will need to swap pulleys (use the one on your original alternator). And of course upgade the wiring, etc. All of the serpentine-belt alternators will interchange through about 2001 model year... after that, they switched to a different 2-wire voltage regulator.

Gravedigger · #10 01-17-2010, 11:06 PM

"YES"

I will be going for the upgrade Thanks gsxr

abaddsm · #11 03-09-2011, 02:55 PM

So in upgrading my 88 300ce alternator there are three wires on the back of my stock alt and the new 110-120 amp e420 alt has a b+ and a D+. Where do the two larger of my stock wires go and where does the little wire go? Thanks.

gsxr · #12 03-09-2011, 03:50 PM

JohnM. · #13 03-09-2011, 09:39 PM

Just put in a 120A S320 alternator a few months ago. Night and day difference. With my stock 65A alternator, my headlights used to dim slightly after 3000rpm, and at redline they were very very dim. After shifting the lights would go back to full brightness. Not very confidence inspiring.

abaddsm · #14 03-10-2011, 09:15 AM

Thanks for the info. The stock 94 E429 alternator is rated at 60-110 amps and I got it for $50 shipped on ebay! Nice wheels on that 91 300e. They look like Porsche turbo wheels in that small pic.

JohnM. · #15 03-10-2011, 09:58 PM

They are actually 17" replicas of the wheels found on the "C58 Brabus"

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