2003 ML 320 Power Outage
Thread Starter
Newbie
Joined: Apr 2014
Posts: 8
Likes: 0
2003 ML320
2003 ML 320 Power Outage
While driving on highway all my lights came on and power went out. Vehicle completely shut down and would not restart. I assume it was alternator failure and I have replacement but I would like to know what to check and how to check before replacing alternator. If it is alternator then how do I replace it. I have replaced water pump, power steering pump, tensioner pulley and belt before, just so you know my level of experience. Thanks to anyone who can offer help.
Thread Starter
Newbie
Joined: Apr 2014
Posts: 8
Likes: 0
2003 ML320
It doesn't do anything at all. The battery is completely dead. I removed the battery and had it tested and charged. Battery is good.
Thread Starter
Newbie
Joined: Apr 2014
Posts: 8
Likes: 0
2003 ML320
ML320 Power Outage
I took the battery to autozone to have it charged. I am going to go ahead and pull out the alternator and take it to have it checked at the same time I'm picking up battery. Will let you know. Thanks for reply!
Thread Starter
Newbie
Joined: Apr 2014
Posts: 8
Likes: 0
2003 ML320
Alternator Replacement
I put in a newly charged battery and it started right up. I am in the process of taking off the old alternator to have it checked. Removed plug in wire, removed battery wires, removed both bolts holding in alternator. There is a bushing that looks like it is split to hold tension on the alternator.... How do I remove the alternator from here?
Trending Topics
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Thread Starter
Newbie
Joined: Apr 2014
Posts: 8
Likes: 0
2003 ML320
Replace Alternator
I'm sorry, I should have mentioned the battery was tested as good, I had it recharged and tested again as a good battery. If the alternator goes bad won't the car continue to run until is drains battery then the car shuts down?
Super Member
Joined: May 2013
Posts: 504
Likes: 7
From: Harare, Zimbabwe
2003 ML55,2007 ML63
No. If the alternator is bad the battery light will lit up. While the car is running check for voltage on the battery it must be 14-14,5volts. Car off 12-12,5 volts. if you get these voltages then your alternator is charging properly.
Don't try to fix what is not broken.....
Don't try to fix what is not broken.....
Thread Starter
Newbie
Joined: Apr 2014
Posts: 8
Likes: 0
2003 ML320
Alternator replacement
For anyone else out there who needs to replace the alternator, the spacers are merely pressed up against the alternator holding it tight. Simply get a 3 foot long pry bar and pry it out using the a metal surface as pry point on both sides, such as engine and alternator, it comes right out.
Mercedes mechanic told me the alternator was definitely bad and the battery was fine. Next time Art you may want to hold off on giving "advise" when you don't really know what your talking about. I was asking a simple question and not asking you to troubleshoot my problem....
Mercedes mechanic told me the alternator was definitely bad and the battery was fine. Next time Art you may want to hold off on giving "advise" when you don't really know what your talking about. I was asking a simple question and not asking you to troubleshoot my problem....
Super Member
Joined: May 2013
Posts: 504
Likes: 7
From: Harare, Zimbabwe
2003 ML55,2007 ML63
Mercedes mechanic told me the alternator was definitely bad and the battery was fine. Next time Art you may want to hold off on giving "advise" when you don't really know what your talking about. I was asking a simple question and not asking you to troubleshoot my problem....
