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New Alternator for a C240 - 2004

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Old 12-29-2013 | 12:14 AM
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stellabonin's Avatar
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c240 2004
Question New Alternator for a C240 - 2004

Anyone has an idea how much will cost a new alternator for a C240 - 2004? I was not sure if it was the battery or the alternator, and the technician from AAA told me that the battery is fine this means that I need a new alternator.
Any comments or suggestions will help.
Old 12-29-2013 | 12:35 PM
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THE C350
I got a Valeo off amazon for $220 brand new. If your car has bosch they can be found for cheaper. If you take it to a shop it will probably be $500 + it is such an easy DIY if you have the tools.
Old 12-29-2013 | 02:32 PM
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2007 W204 220CDI Classic Sedan
Originally Posted by stellabonin
Anyone has an idea how much will cost a new alternator for a C240 - 2004? I was not sure if it was the battery or the alternator, and the technician from AAA told me that the battery is fine this means that I need a new alternator.
Any comments or suggestions will help.
Before making a decision I would get the output voltage figures from the alternator ie about 14.5 volts with engine running, 12 volts when stopped . The battery should be load tested & the voltage regulator checked.

Good luck.
Old 12-30-2013 | 12:15 PM
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13's550/2000's430/13'gl63/'13's550/10's63
you can have it rebuilt for about $90 bucks, look in your phone book for a repair shop!
Old 12-30-2013 | 06:56 PM
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Mercedes-Benz, Porsche, BMW, MINI and more!
We offer new and rebuilt alternators for your C240 from $ 220.50 by brands Bosch, Valeo & Genuine Mercedes-Benz. A rebuilt Bosch unit is an excellent alternative to new.

You may browse and get further information here.

Make sure it is in fact your alternator.
Mark/Pelican Parts
Old 07-17-2018 | 11:14 PM
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E63 SL55 996TT C5Z06
Just had my Bosch alternator repaired for bad bearings and am trying to get the damn thing reinatalled

thr lower mounting just slid right into the slot and was easy to hand turn the bolt to snug

for the life of me I cannot get the alternator top mount to slide into the slot so I can attach the upper Bolt It seems like it’s 1/16 of an inch too wide now - HELP how do I get this sucker back in? You can see in this pic the top mount is out and I can’t force it into the slot


Any tips tips or tricks would be greatly appreciated!!!
Old 07-17-2018 | 11:20 PM
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E63 SL55 996TT C5Z06
This is for a 2004 c240 E26 4matic wagon - the alternator case was also repaired / repainted and perhaps that added a slight more thickness to the alternator upper mount which is preventing it from sliding into the slot???? Not sure if I should remove it and file it down a slight bit so it will fit?????? Any help would be greatly appreciated again.
Old 07-17-2018 | 11:56 PM
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2005 C240 2011 R350
that outre mount should be a bushing you can tap out....
Old 07-18-2018 | 12:34 AM
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E63 SL55 996TT C5Z06
Thank you efzauner I just found a few YouTube videos explaining what you mentioned about the bushing and how to press it back into the mount. Will give it another go tomorrow! Thank u

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