The OEM alternator is only 55 amps and costs nearly $400, which is stupid expensive and wholly inadequate for off-road lighting, audio amplifiers, and other additional accessories so I decided to go with the CS130D GM alternator, purchased for under $100 new (no core charge) and has a 130 amp capacity.
I'm getting 14.8v from the upgraded alternator at 700rpm and maintaining 14.2v when every possible accessory and light is turned on at idle.
I just did a standard exchange on mine (Valeo 120A), paid 300€ deposit included, so it's definitely a good deal.
Only the NEW valeo or original BMW alternators last in these cars.
Both Valeo and Bosch are good brands. I’ve never owned a Mercedes, but both Valeo/Bosch are installed in various BMWs from the factory.
I had to buy a replacement remanufactured alternator (Valeo 120A one) and it was a straight replacement that solved the problem.
I installed the Valeo alternator that I got from FCP Euro and everything works now. The rebuilt Valeo was $200 less expensive than the Valeo that O’Reilly’s had in their computer but couldn’t order themselves. Also it was immaculate. It was a true rebuild and looked brand new in every way. It was $400.
A bearing went in our original alternator so I replaced it with a Valeo brand and it's pretty loud when it clicks on. It is loud enough that I'm wondering if I got a bad alternator --or is this normal??
It's the typical whirl or whurr noise --it's silent, and then you can hear the whirl or whurr noise when the alternator clicks on. It seems mechanically and electrically fine: It's doing what it should be doing electrically (charging, correct voltage, the battery is happy, the car runs better with this new alternator, etc.). It's just loud.
three alternators in a Cadillac, even "new GM" are remans, only way to get a new one (never installed, made of new parts, new for you) is to buy a new car.
In the process of replacing the alternator..it was bad.
Had an appetite for alternators, as they put it behind the rear cylinder head and tried to keep it cool with some little rubber/plastic air duct. Failboat. We sold the car with its third alternator, each failure attributed to failure of the rear bearings.
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