What Are the Most Common Electrical Issues in Ford S-Max Cars?

I've been having trouble with my Ford S-Max's electrical system. Some days everything works fine, but other days I'm having issues with the headlights, interior lights, and even the radio. What could be causing this and should I take it to a mechanic?

It sounds like you may be having issues with a faulty alternator or battery. It's best to bring your car to a certified mechanic to have it properly diagnosed and repaired.

I've had similar issues with my S-Max and it turned out to be a faulty wiring harness. I suggest bringing it to the dealership for a thorough inspection.

Before going to a mechanic, try checking your fuses and relays. It's a simple fix that could save you some money.