S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

Alternator Clearance

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Old 03-02-2020, 09:05 AM
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Alternator Clearance

Gentlemen!

I have successfully replaced the driver side engine mount...

It helped significantly, but it didn’t 100% eliminate the slight vibrations.

Taking a look at passenger side, it looks like it would come right out with the removal of the alternator. Sweet! Alternators are easy!

HOWEVER... That is a pretty big *** alternator and there is NOT a lot of room to fiddle it out of there. It is also very low on the engine.

What am I missing here? Does it actually fit? Do I need to remove a few things?

Thanks!
Old 03-02-2020, 01:43 PM
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'15 S550, '10 E350 P1/P2, '02 ML320
Do you have a 4Matic or 2WD? If 2WD then you can drop the sway bar and pull it out from the back of the engine.

If 4MATIC, then no idea.
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Old 03-02-2020, 03:16 PM
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RWD

I'll get it on my ramps and take another look.
Old 03-11-2020, 04:33 PM
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Anyone else swap an alternator? I can't imagine that an alternator is a difficult item to remove from any car. It just looks tight.

There doesn't seem to be any room to pull the mount out the back despite RWD.
Old 04-23-2020, 09:48 AM
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Alternator for W221 is hard for remove because there are bracket to hold 02 line of transmission oil coolant, you need the lift to remove this bracket in order to access the last alternator bolt
Old 04-23-2020, 10:57 AM
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Originally Posted by John Galt
Anyone else swap an alternator? I can't imagine that an alternator is a difficult item to remove from any car. It just looks tight.

There doesn't seem to be any room to pull the mount out the back despite RWD.
by the looks of it, if the radiator fan is removed there should be just enough..but getting the fan out looks like a pain too lol
Old 04-23-2020, 12:01 PM
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Originally Posted by COUPCONNOISSEUR
by the looks of it, if the radiator fan is removed there should be just enough..but getting the fan out looks like a pain too lol
The most dificulty is to remove the last bolt as I mentioned earlier, once 04 bolts removed then you need to take fan shroud out as well as EGR valve on the right bank out in order able to take alternator out.

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