Skip the auto shop - Our mechanics make house calls

Q: What does it mean when a 1999 Mercedes-Benz shuts off when the headlights are turned on?

asked by on

What does it mean when a 1999 Mercedes-Benz shuts off when the headlights are turned on?

My car has an automatic transmission.

A: This is a common problem when the crankshaf...

This is a common problem when the crankshaft position sensor is faulty. This is a small sensor on the front of the motor down near the crankshaft that monitors crankshaft speed which is relayed to the main computer to control ignition timing and fuel injection.

When this is not working properly, this can cause intermittent stalling and loss of ignition spark. This may not be directly related to the headlights being on or off as this may be a result of a different issue or potentially a short in your electrical system.

If you’d like to get this fixed, I would recommend having an expert from YourMechanic come to your home to diagnose your stalling issue firsthand and help you repair it as necessary.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Bank 1 running to rich and injector 1 contribution fault Intermittent.

Hi and thanks for contacting YourMechanic. What you are experiencing is a misfire detected in cylinder 1 and a random misfire in cylinder 3. This could be caused by either the fuel injectors not firing, the spark plugs fouling out,...

Q: I have a ticking noise in the front axle in my 99 Jeep Cherokee 4x4.

Hello, thank you for writing in. The ticking noises you are hearing may be coming from the actual axle itself. The CV joints on both sides of the axle can click or tick as they wear down. You would hear...

Q: Car starts, but doesn't stay started.

The problem you describe can be the crankshaft position sensor. The sensor is a major failure on these vehicles and can cause no starts or intermittent starts and stalls. Have a qualified mechanic test you car with an approved scanner...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...