Why does my Mercedes Benz alternator keep failing?
The alternator charges the battery and provides your car with a constant source of electricity while the engine is running. Over time, the alternator will begin to fail and cause trouble with the various electrical devices in the car.
How to replace alternator on Mercedes Benz E C CLK SLK s?
Tighten the nut for the electrical cable ( positive +) between 15-18Nm. Plug the electrical cable on the back of alternator and make sure it clicks when you push it in. That way you know it is locked in place. Reinstall the serpentine belt, the engine cover and the reconnect the battery. 2 Bolts that hold the alternator in place. Max 45 Nm.
How to replace alternator in Mercedes Benz W203?
Turn the tensioner all the way counter-clockwise and insert a retaining pin between the rotating part and the tensioner base. If you do not have a retaining pin you can use a 5mm Allen. The alternator is held to the engine by two bolts (red arrows). Use an E14 Torx (red arrow) and remove the two bolts.
How to troubleshoot an alternator and charging system problem?
If necessary, adjust the belt with the help of your car owner’s manual or repair manual. Inspect the belt for signs of cracks, cuts, shiny spots, deterioration or other signs of wear or damage. Change the belt and belt tensioner at the manufacturer’s recommended interval. 2. Check for Wiring Problems
The alternator charges the battery and provides your car with a constant source of electricity while the engine is running. Over time, the alternator will begin to fail and cause trouble with the various electrical devices in the car.
Turn the tensioner all the way counter-clockwise and insert a retaining pin between the rotating part and the tensioner base. If you do not have a retaining pin you can use a 5mm Allen. The alternator is held to the engine by two bolts (red arrows). Use an E14 Torx (red arrow) and remove the two bolts.
What happens when the serpentine belt fails on an alternator?
The serpentine belt powers the alternator, and if it fails, the alternator will stop working the moment your belt wears out and breaks, or the pulley becomes damaged. This can also happen if the serpentine belt is not tightened correctly. Most cars have automatic tensioners, but these can fail, so it is better to double-check.
What should I do if my alternator is not charging?
The alternator normally lasts longer than the battery. There are some easy steps you can go through to check the function of your alternator. Tap the alternator carefully with a hammer while the engine is runnin; if the charging goes back to normal, the coals inside it are worn out.
What to do if your alternator goes out?
The first thing to check is the battery light on the instrument cluster. This light bulb is part of the alternator field circuit; if it burns out the alternator will not charge. Simply turn the key on and see if it illuminates briefly then goes off. If the light does not illuminate, you’ll need to replace it before continuing.
How much does it cost to replace an alternator on a Mercedes C320?
The average cost for a Mercedes-Benz C320 alternator replacement is between $533 and $576. Labor costs are estimated between $165 and $208 while parts are priced at $368 .
What to do if your alternator is bad in your car?
One thing you can do to troubleshoot your car is to go to Advance Auto Parts or AutoZone and have them do a FREE alternator / battery check. This test may be able to point you in the right direction. 3. Secondary Battery / Auxiliary Battery. Some Mercedes Benz models such as the E Class or the CLS Class have a secondary battery.
Why do I get battery alternator VISIT WORKSHOP error message?
These are the main reasons why you are getting the Battery Alternator Visit Workshop Error Message. If you need to replace any of the batteries you can order them on Amazon using the links below and also help us at the same time. Malfunction electrical consumers switched off.
What are the symptoms of a bad alternator?
7 Common Symptoms of a Bad Alternator. 1 1. Battery light. The illuminated battery light on the instrument cluster is the first sign to the driver that there is an issue with the charging 2 2. Lack of power or Limp Mode. 3 3. Noise. 4 4. Broken Serpentine belt. 5 5. Burning Smell.
What should I do Before I replace my alternator?
Before you replace the alternator make sure that your battery is not the problem. One thing you can do to troubleshoot your car is to go to Advance Auto Parts or AutoZone and have them do a FREE alternator / battery check. This test may be able to point you in the right direction. 3. Secondary Battery / Auxiliary Battery.
What does it mean when alternator reading stays the same?
If the reading stays the same or drops, that means the alternator isn’t charging and you may need a new one. If the reading is more than 2 volts higher, that could mean that your alternator is overcharging. Either way, take your car to an auto repair shop to find out what’s wrong.
When is it time to replace your alternator?
Your car might die, but you may be able to restart it with a jump start. If you notice that your headlights dim or your battery won’t stay fully charged, it may be time to replace your alternator or other related parts. This might include replacing the voltage regulator if it is separate from the alternator.
If necessary, adjust the belt with the help of your car owner’s manual or repair manual. Inspect the belt for signs of cracks, cuts, shiny spots, deterioration or other signs of wear or damage. Change the belt and belt tensioner at the manufacturer’s recommended interval. 2. Check for Wiring Problems
Can a new alternator be installed on a low battery?
WARNING!!! The battery must have a charge in it of at least 12.8 volts. If the charge is lower than that, take the battery to an auto parts store and they should deep charge it for free. You should never install a new alternator in a system with a low charge battery. You could fry the bridge and then you are back to square one!
Why does my alternator not charge on tickover?
On checking the battery voltage was low – 11.8V engine running. Battery was replaced about 1 month ago.After much investigation discovered that the alternator does not ‘kick in’ until I rev the engine to approx. 3000rpm – it then charges away happly for the rest of the journey (at around 14.5V) even on tickover. Has anyone seen this problem before?
One thing you can do to troubleshoot your car is to go to Advance Auto Parts or AutoZone and have them do a FREE alternator / battery check. This test may be able to point you in the right direction. 3. Secondary Battery / Auxiliary Battery. Some Mercedes Benz models such as the E Class or the CLS Class have a secondary battery.
What should alternator voltage be with battery off?
If the battery is faulty, your alternator tests will not be accurate. This should read a little more than 12 volts with the engine off. Next check the voltage of your charging system under load, the voltage should be within 13.2: 14.5 volts d/c.
When to replace alternator in Mercedes Benz E class?
It might be time to replace the alternator in your Mercedes-Benz E-Class. This article applies to the Mercedes-Benz E-Class (2002-2009). All vehicles are equipped with an alternator.
How do you unplug an alternator from a car?
Orient the alternator on its side. Remove 13mm nut with socket or wrench after removing plastic cap. Press the clip and pull the plug straight out to disconnect the harness. Figure 5. Unplug the alternator’s wire.
What is the job of the alternator in a car?
The alternator’s job is to maintain the balance between all of these components; It works closely with your vehicle’s battery to achieve the balance. When this part begins to fail, there are tell tale signs that it is on its last breath.
Can a pulley be removed from an alternator?
Remove the alternator belt. Neither the bolt nor the pulley need to be removed. The alternator is held onto a bracket via two long bolts. They will need to be removed prior to removing the alternator as a unit. Use 11mm socket to remove bolts. Figure 3. Remove the bolts holding the alternator in place.