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・Fair and transparent pricing

Get a quote

What others are asking

Q: Good evening from Ghana in west Africa, please help me with this,i want to the location of vehicle output speed sensor on benz ml3

Hello, thank you for writing in. An output speed sensor on your vehicle would likely trigger a P0720 engine code. If this sounds like the correct sensor, then you are looking at the speed sensor located on the transmission's electrical...

Q: Check Engine Light with code P0740

There are a number of symptoms that may accompany a P0740 code, it may be that your car will stall at stop lights, or have trouble shifting, or you may not notice anything at all except your gas mileage is...

Q: Car won't start up, but starter and battery are working fine.

This may be related to many different possibilities, some of which may be related to a lack of spark and some of which may be related to a fuel delivery problem or a combination of both. For example, if the...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.