Q: Electrical problems with keyless entry, headlights and radio

asked by on

I've been using the keyless entry but it wouldn't work correctly and open all doors. I changed the batteries and tried but it still didn't work right. I turned the car on with the secondary key. The headlights didn't work and the radio was randomly going off and on. These issues don't happen when the car is warmed up. What should I check first?

Hello. We will be happy to assist. The problem you are experiencing is common. The symptoms you have are identical to many other SL500 owner complaints. The component which causes all the misbehavior is the EIS (Electronic Ignition Switch). Symptoms of a faulty EIS include SRS light illumination, rollbar light illumination, radio flickering, headlights not working, or no start conditions. I’d recommend having a certified technician diagnose the electrical issue with these components and test the EIS to help determine what the problem is.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Electrical problems with keyless entry, headlights and radio

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: How do I customize the Unlocked Door Anti Lock Out settings?

When the Unlocked Door Anti Lock Out feature is turned on, then the driver door cannot be locked when it is open. When the feature is turned off, the driver door can be locked when open, and will set the...

Q: i plugged my negative cable on my mercedes 2008 c300 before positive what could i have messed up

As long as you did not reverse the polarity of the battery (i.e., connect the negative terminal of the battery to the positive side of the vehicle electrical system and connect the positive terminal of the battery to the vehicle...

Q: Random gear shifting

Hello, it sounds as if you have a faulty transmission pressure control solenoid or contaminated fluid. Also, the electronic gear shift sensor under your gear shift could be compromised if something has spilled on it. I suggest that you have a...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...