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Check Engine Light on; car stays at one speed
Hello. It sounds like you have a transmission problem. If the transmission is staying in one gear, I would have your transmissions inspected by a certified mechanic. Since the other control units are missing, information provided by the transmission control...
Car hesitates when I accelerate
There are many possible reasons as to why a vehicle may hesitate on acceleration. If the Check Engine light has come on I would recommend having the vehicle scanned for trouble codes. Modern gasoline engines run highly sophisticated engine control...
Gasoline smell in back of car
Hi there. I believe that the problem may be a seal leaking for the sending unit on the gas tank. It will require taking the rear seat out, lifting the carpet, and inspecting the seals for leaking gas. I would...
Windshield wipers and horn not working
Hello. The first thing to check is all the fuses. If all the fuse are good, a scanner needs to be connected to car to check for code and data. Everything in the column and steering wheel goes through the...
Air conditioner blowing hot air
Your air conditioning issue is most likely due to a low refrigerant level in the system. Over time, the refrigerant will slowly leak out. You won't be able to notice it because it's a gas; you will only notice when...
gas runt out at 1/2 gas of tank
When you get close to a half a tank and go to refill the tank does the gas tank have a lot of vacuum on the gas gap when you remove it? The gas cap should not let a vacuum...
Car start problems, diesel leak
If liquid fuel can leak from the line, air can definitely be introduced into the line during operation. This air in the line can throw off calculations for the air/fuel mixture and cause the engine to stall or run very...
Car stopped working and starting up - 2001 Mercedes Benz C240
The C240, like all Mercedes built in this century, is a very complicated car and is subject to a number of electronic failures. The ESP on the warning light stands for Electronic Stability Control which exerts a certain amount...
Not starting a month after replacing battery
The information that has been provided for your Mercedes is limited which unfortunately makes it difficult to point you in the right direction. So I see originally that a bad battery was the first culprit. Allowing a vehicle to sit...
If I have low coolant and my car won't blow cold air could that be the problem? I have freeon
Hey there, thanks for writing in about your 2003 C240 Mercedes-Benz. The low coolant light only means your engine coolant level is low in the engine cooling system. You may have a coolant leak. This has nothing to do with...
Is there anyway to fix cigarette lighter and also to connect iPhone to car to listen to music?
Hello. There should be an AUX mode in the car's stereo system that will allow you to use your iPhone to supply music. If this does not work, you may have a faulty stereo that may need to be replaced....
Keys won't turn in ignition
Hi there. From the description you have given, your ignition may have developed some wear over time. Trying another key may correct the problem you are having. If an alternate key does not resolve the problem, then it could be...
Car won't start - 2004 Mercedes Benz C240
This maybe caused by a variety of potential issues. For starters, I would suggest testing the key a few times while moving the steering wheel to see if this will get it to start again. Try another key, too, if...
What are the chances it could be the fuel relay that is stalling my car?
Hi, thanks for writing in. It's hard to tell what the problem without doing some further testing. If you do not hear the fuel pump prime when you turn the key to accessory, this is a huge sign. Technically, it...
Vibrations in steering wheel and warning lights on
A vibration over 50 mph generally indicates a balancing issue. It would be recommended to get these tires road force balanced. Otherwise undesirable wear patterns and tire noise can develop. The BAS/ESP light may indicate a problem with the brake...
Car won't turn over, cracked multi-vee belt, & service b exceeded
For the starting issue the drive authorization system should be looked at. Low battery voltage or a component failure can cause the starter to not turn over. The other items are maintenance items and can be taken care by a...
What does 'Top Up Coolant' light mean?
This indicates the engine cooling system is low on coolant and will need to be topped off. The system should be inspected for leaks to ensure there are no other issues causing the engine coolant level to drop. Please note:...
Knocking sound when going over bumps in road
Without being able to hear the noise it will be hard to make an accurate assessment, but worn or damaged strut mounts can be extremely noisy while driving over bumps and exhibit a noise similar to what you describe. However,...
Turn signals go fast/slow, headlights turn on/off, console beeps
The sockets for the turn signals on the C240 have been known to be problematic. Due to poor connection between the bulb and socket high resistance can result causing the turn signals not operate properly leading to a total bulb...

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