What does code P0562 mean on a Mercedes-Benz and is it safe to drive?
P0562: System Voltage Low. Here's what it means on your Mercedes-Benz, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
What this code means
The PCM has detected that system voltage is below the acceptable threshold. Usually points to a failing battery, alternator, or a poor ground connection.
Common causes for your Mercedes-Benz
- Weak or failing battery
- Failing alternator not producing sufficient output
- Poor battery cable or ground connections
- Parasitic draw draining the battery
Symptoms
- Check Engine Light
- Dim headlights
- Electrical accessories acting erratically
- Hard starting or slow cranking
Typical fixes
- Load-test battery and replace if weak
- Test alternator output and replace if low
- Clean battery terminals and ground connections
Repair cost range
For a Mercedes-Benz, repairs for P0562 often fall between $100 and $500, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on Mercedes-Benz
Mercedes P0562 low voltage requires checking the IBS (intelligent battery sensor) mounted on the negative battery terminal before replacing the battery. Mercedes ECUs require battery registration via XENTRY after replacement—a non-registered battery causes the charging system to undercharge or overcharge.
Most commonly affected models