Skip the auto shop - Our mechanics make house calls

Q: My Mercedes 2009 CLS 550 will crank but wont start

asked by on

My car started hard cranking 2 weeks ago after sitting in the garage for a week the next week it would not start at all checked the battery and fuses everything looks good

A: First, try using an alternate key. If it st...

First, try using an alternate key. If it starts easily with a different key, then the original key needs to be reprogrammed. If the problem persists with either key, then it could be the ignition switch or possible a fuel pump. If you would like help, have a qualified technician, like one from YourMechanic, diagnose the starting issue and guide with a repair.

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: Squeaking from front driver's side tire

If the noise is heard when turning it could be the strut tower bushings. These are rubber bushings that ride on a bearing. They insulate the strut from your vehicle and aid in turning. Over time dirt gets between the...

Q: Battery and brake light on dash stay on car does not start sometimes

The brake light may be on if the voltage is too low and the battery light is on due to the alternator is not charging. You should have the battery and charging system checked to see if you need the...

Q: How do I unlock the doors?

The remote keyless entry (RKE) key fob makes it very easy to unlock your doors. Press the unlock door button on the RKE transmitter once to unlock the driver’s door, and twice to unlock all of the doors. You can...

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 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.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.