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C300

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Question
What oil type should be used for my car and how often should it be changed?
The oil specifications show synthetic oil in one of these weights 0w30, 5w30, 0w40, 5w40. The oil change interval is every 5,000 miles.
Question
My Mercedes has shredded two belts in a row
Mercedes uses a devilishly complicated automatic tensioner whose life span is about the same as the belt. The tensioner depends on the twisting force of a sleeve of bonded rubber to keep the belt tight, and by the time the...
Question
Hood sensor
Such a system is very limited in extent, and works using simple components. The Factory Service Manual for this vehicle will have a test protocol for the system. In addition, if the work was done at a Mercedes Benz dealership,...
Question
Engine vacuum pump and centrifuge is leaking.
Hi there. All parts on a car are designed to have a longevity date to them, but it is normal for parts that are more than 5 years old to fail. The vacuum pump and centrifuge could be leaking for...
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Electrical / Hose RODENT Damage to vacuum pump.
Hi there. If you have had a rodent living in your engine compartment, there could be multiple issues as rodents tend to chew through just about everything. It is possible that the rodent could have damaged the vacuum pump, but...
Question
P2006 code is present in the computer.
Hi there. With having the code P2006 present, check the intake wiring to the runner control and see if there is a good connection. Also, the runners in the intake could be clogged and needs cleaned out. A leaking or...
Question
Do I need a Transmission service?
If you ask your Mercedes dealer that question, they will tell you no, that the fluid is good for the life of the transmission. But many independent Mercedes mechanics are recommending that you do the fluid service at around 60...
Question
Break pads and rotors
Making a determination on what parts would need to be replaced will require an inspection of the brake system. Typically, when this light comes on, it means that the brake pad sensor has come into contact with the rotor and...
Question
Car not starting
Hello, it sounds like you may have a weak battery, a failing voltage regulator or failing alternator. As you may know, the alternator is responsible for charging the battery while the engine runs by generating amperage and recharging the battery...
Question
My key will not easily come out of the ignition on my 2011 Mercedes C300
Hello. If the key will come out then you have an issue with the key lock sensor in the shifter assembly. It is not uncommon for the shifter assembly to break internally or to become warped and make poor contact,...
Question
Where is the fuel filter located
The fuel filter on the gasoline powered cars is located inside the fuel tank. Yes, it seems crazy, but it's part of a new system that puts everything in the tank, pump, filter, regulator, pressure sensor, etc. There is a...
Question
On a 2008 Mercedes Benz c300 where is the fuel filter located?
Hello. The fuel filter on your vehicle seems to be inside of the fuel tank. It should be serviceable by removing the rear seat cushion. Here Is a great write up with the instructions on how to remove it and...
Question
How much to repair an electronic steering lock 2009 c300
You may be right that your car needs a new electronic steering lock (ESL) but there could be other issues as well. There is a digital conversation that takes place among the modules of your car before the decision to...
Question
Worries about maintaining a german car rather than Japanese
The same mechanical and electronic technologies are used in cars worldwide although there are always differences in repair procedures, assembly techniques and specifications. A competent mechanic will be able to repair a car no matter what the country of origin...
Question
DTC Code interpretation
It looks like you're using the Star Diagnostic system. So you are getting Mercedes Proprietary codes. The codes may not be published in a place where you can access them without going through Mercedes. They guard a lot of their...
Question
My doors no longer lock automatically when the car is in motion. Why is that?
The automatic door locking feature can be enabled or disabled with the master lock switch. To turn the door locking feature on, press and hold the master lock switch down for about five seconds. You will hear a beep when...
Question
car wont start due to steering lock issue
Hi there. Unfortunately, without knowing more details about symptoms you might have experienced prior to the car not starting, or inspecting the car ourselves, it's very difficult to tell for certain whether this mechanic is correct in the diagnosis. However,...
Question
Why my drive belt keep shredding ?
Usually, by the time a Mercedes drive belt is ready to be replaced, the tensioner is shot too. If you haven't replaced the tensioner, than you should. If the pulley that was replaced was in fact tensioner, then you need...
Question
I replaced my battery and my musical system is restarting all over
Check your connections to be sure all of the terminals are connected tightly. There are several large lines incorporated to the positive cable and if any one is loose, there may be a power interruption that is causing your your...
Question
Can you put a black light in the dome light of a Mercedes? 2009 Mercedes C300
HI there - short answer is "No", there are no black light bulbs which will replace standard automotive 12 volt sockets. Black lights are a form of fluorescent bulbs, which require transformers, and come as a "long tube" bulb. Custom...

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