When to remove and replace the alternator on a Mercedes?
The alternator replacement is the last solution after all other procedures have failed to solve the charging problem . So after you checked the battery condition , the voltage regulator , check for any shortcircuits , than you can go ahead for the most expensive service : Remove and replace the alternator .
What kind of diagnostic facilities does the W203 C230 have?
I do not know what diagnostic facilities your W203 C230 has – but knowing that the W209 CLK is largely based on the W203 design, I wonder if you also have this information available at the cluster. This thread is from the W209 sticky section.
What to do if your alternator is making noise?
(If the alternator is making noise you need to replace it or have it rebuilt.) Then disconnect the battery, remove the fan belt, and pull the alternator.
How do you remove an alternator from a car?
Lower the alternator down a little so you can get access to the connections on the back. Unplug the harness (yellow arrow), pull the plastic cover off the cable connector (red arrow) and use a 15mm socket to remove the cable. Now you can slide the alternator out of the engine.
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.
How do you remove an alternator from a Mercedes Benz?
Lower the alternator down a little so you can get access to the connections on the back. Unplug the harness, pull the plastic cover off the cable connector and use a 15mm socket to remove the cable. Now you can slide the alternator out of the engine.
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.
When to disconnect battery cable to test alternator?
Never disconnect a battery cable while engine is running to test alternator, you may cause damage to alternator or other electrical components from the surge in amperage. If your battery appears to be leaking, then your voltage regulator has probably failed.