Skip the auto shop - Our mechanics make house calls

Q: Car does not turn on

asked by on

The key for my car broke in half the man tried with pliers to turn it on with half of the key afternoon many tries with the pliers the turned on and I drove it home. I went to the dealer and got a replacement key made. When I tried the key into the switch the only thing that happened was the lights and air came on but it did not turn the car on. I am not exactly sure why the car does not start. We tried giving energy to the battery but that didn't work. The battery is fine. And the key goes into the switch and turns the air and lights on but it will not go pass that to turn the car on

My car has 187000 miles.
My car has an automatic transmission.

A: There is more going on with the Mercedes Ke...

There is more going on with the Mercedes Key than simply turning a switch. There is a micro transponder in the key, and there is an antenna in the ring around the key hole so when the key is inserted into the switch, the key and the car do a little electronic handshake before the starter is enabled.

If your Mercedes dealer made a key, they should have programmed it correctly. The procedure for reprogramming requires that the car be in the shop when the key is made. They have special computer equipment and software to do this job that is not available in the aftermarket to prevent car thieves from being able to make keys. I suggest you contact the dealer about having the key reprogrammed

If you'd like a second opinion on this, YourMechanic can send a mobile technician to your home to diagnose the starting issue firsthand and suggest what to do from there.

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・Save up to 30%

Get a quote

What others are asking

Q: EGG code p0400, multiple cylinder misfire, removed and cleaned egr and pipe with no change

Hi there. The P0400 EGR (exhaust gas recirculation) valve code may not be a valve not working. This code description is a EGR flow malfunction. The fact that your vehicle has multiple cylinder misfires leads me to believe the valve...

Q: Cannot find the air leak in my tire.

I find that many people assume that when their car tire is low, they will find an obvious puncture mark. However that is not always true. All tires lose air for various reasons and if you are not able to...

Q: My car cranks but don't start. What could be the issue?

Any number of components can cause a crank but no start condition. Lack of spark - caused by a bad ignition coil or control module, as well as a crank shaft sensor could be at fault; lack of fuel due...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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...