Q: Stalling after cold starts and problem with lights

asked by on

When I startup my Mercedes and its cold it shakes, and if I step on the gas it stalls. When I lightly step on the gas and leave my foot there long enough for it to warm up then it doesn't stall. Once it’s warm it’s OK. It only happens when it’s cold. I am also having a problem with my headlights and electrical wiring. When my battery dies, and I get a jump to start it back up the headlights don't work. The regular beams on the driver’s headlight works and the right is weak. And when the high beams are on the passenger light works and the driver’s side doesn't work. It takes a few days of driving for the headlight to work properly again. Do you know what’s wrong and how I can fix it?

It sounds like you have a sticking idle air control valve that frees up after the component warms up. The valve may be able to cleaned if there is a great deal of carbon build-up inside the valve.

As far as the headlight issue, the connectors and wiring to the headlight assembly need to checked and the assembly inspected as well. If there is no fault indicated for the headlamp being out one thing to consider the exterior lamp monitoring control unit as possibly creating resistance in the headlight circuit. You may want to enlist the help of a mechanic, such as one from YourMechanic, who will have the tools and expertise to diagnose and correct both the stalling problem and headlight issues.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. Stalling after cold starts and problem with lights

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: Problems with ABS

The odometer most likely stopped because there is a problem with the vehicle speed sensor. This sensor tells the computer how fast and how far the car is going, so it knows how many miles to count on the odometer....

Q: I have a question about my headlights.

You may want to check local laws regarding the use of colored light use. You may only be allowed to use them at car shows and while parked. If you want to add lights to the headlight housing, it may...

Q: Rear right brake lights. 2000 GMC C2500

Hello there. Brake and turn signal light faults are one of the most common repairs on the 2000 GMC C2500. The brake light bulbs are a dual filament bulb. One side is lit all the time when the vehicle's headlights...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...