Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
My name is ***** ***** I am a professional here at Just Answer. I noticed that your question had not received a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.
Double check and make sure the battery cables are clean and tight and the connections at the alternator are clean and tight and properly connected as well.If all of these are or were checked and found to be o.k. let me know.
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Let me look at some diagrams and I will post back here shortly.
Inspect in your passenger front fuse panel fuse #49 (15 amp) and see if it is blown needing replaced.If this is found to be o.k. let me know.
Under hood fuse panel in the passenger front engine bay area.
Let me know what you see when your ready.
The fuse powers signals to energize and help operate the alternator.
If the issue with the charge light did not occur until after you replaced the alternator I would have the facility you purchased the alternator from test and see if you received a faulty alternator and see if you can get a replacement under parts warranty from them as most parts facilities will do.This may very well be that the replacement you installed is faulty.
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I wouldnt remove it.Take your vehicle to a local parts store and have them test it to see if it is faulty.They can test it with it in the vehicle.If found faulty then contact where you purchased it and see if they will reimburse replacement costs as well as replace it with another one.
Duralast usually makes some cheaper parts so there is a chance that it is not charging properly.