Q: 2007 Mercedes C230. Cranks but won't start. Battery is only 1 year old. After a few attempts car starts. Alternator? Starter?

asked by on September 14, 2017

2007 Mercedes C230. Cranks but won't start. I can hear the fuel pump engage as normal. After a few attempts, it starts. This happened for the first time yesterday, a few hours after getting gas. Battery is only 1 year old.

Bad gas? Alternator? Starter? Fuel delivery system issue?

My car has 80000 miles.
My car has an automatic transmission.

Car is hard to start Inspection $79.99 - $99.99 Get a Quote

Hi Craig. Thanks for contacting us today. Generally speaking, when you attempt to start the vehicle and it finally ignites after a few times, it’s caused either by a fuel / air mixture issue or a loose or worn out ignition system component. The mass air flow sensor as well as clogged or dirty fuel injectors can be a few sources, as can a crankshaft or cam position sensor (or the harness connected to them). If you can crank the engine over, then you can eliminate the alternator and starter completely. It might be best to have a professional mobile mechanic come to your location to complete an onsite inspection, which would allow them to isolate the root issue and recommend or complete the right repairs.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Had oil and battery changed, and now the car will not start.

It is possible that during the battery replacement and oil change that something was unplugged accidentally. It is also possible that the battery could have been installed incorrectly. If the engine is cranking it is turning over. If everything was...

Put a water pump and timing belt on it and alternator it crunk up for 20 seconds and cut off now it wont start but does tirn over

Assuming the vehicle was running before the timing belt was replaced, I have to ask, are you sure you lined up the timing marks correctly? This would be the first thing I would check myself if I were working on...

Vibrating when I stop 2007 Chrysler Pacifica

Hello - if you mean that the vibration occurs while braking, irregular brake pad deposits on the rotors (sometimes referred to as "warped rotors") are the likely cause. Worn suspension struts and/or loose steering links make this problem worse. Resurfacing...

Car not changing gears

If the shifter will not move from park to another gear, you may have a problem with your shift lock solenoid. If the vehicle will go into drive but will not shift out of first gear, you may have internal...

Stalls while applying throttle. Already changed two warm up regulators

Hello. I think you may have a problem with the cold start valve not dumping the proper amount of fuel to allow the car to start and remain running on a cold start. The distributor should be checked as well...

2007 galant es blower motor resistor or transistor

Your vehicle is equipped with a blower motor resistor block. It is a modular, replaceable assembly and the part is different for Galants with and without A/C systems. If your blower motor is not functioning, failure of the resistor block...

My 2007 Lexus ES 350 won't accelerate but the I can hear the engine running. Is this a coolant or radiator problem

Hello. If the engine is revving but the vehicle is not moving then it sounds like a transmission failure. This needs to be checked first. If the engine is not revving then it may be an engine issue. I would...

Car loses power, cannot start. 2002 Mercedes-Benz CL500

Hello there, misfires are a common fault on cars as they get older such as the 2002 Mercedes CL500. Many different faults can cause the misfires such as the spark plugs, coil packs, fuel injectors, fuel pump, MAF sensor, oxygen...

Fuel system, inertia relay, or pump will not start, never had problems in the past

Hello there, thank you for asking about your 2007 Ford Explorer. The first thing to do is to have the fuel pressure tested to see if the engine has pressure. Make sure the Theft Light is not on or flashing....

Related articles

Ten Sports Cars That Double as Good Daily Drivers
The best daily driver is a car that's reliable, usable, and still fun to drive. Popular daily sports cars include the BMW M3, Subaru WRX, and VW GTI.
Top 10 Factors to Consider When Buying a Luxury Car
The The idea of owning a luxury car is appealing. The glossy paint, swoopy lines, and prestigious badges speak of the owner’s success in life, while the interior opulence offers scented leather surfaces, high-tech telematic devices, and all the creature-comfort...
The Best Used Cars to Buy If You Live in a Windy Area
If If you live in a windy area, one of the most important things you’re going to be looking for in a used vehicle is the ability to remain stable on the road on even the most blustery days. That...