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05 C230k 1.8L 6 speed Disappearing coolant

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Old Nov 17, 2019 | 09:08 AM
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2005 C230K 6 speed
05 C230k 1.8L 6 speed Disappearing coolant

Good morning!
New to the forums as well as being a Benz owner. Been searching like a mad man for information to my issue.

Recently purchased at 188k, was already experiencing an overheating issue... now its drinking coolant faster than I can buy it. No leaks on the ground. No engine bay leaks (that I can see), car also is throwing misfire codes from all 4 cylinders (pending full tune up).

The car fan engages after about 10minutes of the car being started and has ran hot previously (no overheat just redlined).

Any ideas on where to search? I've came across the possibility of the transmission cooler lines being faulty seeing as The coolant literally DRAINS as the car is running.

Thanks in advance, happy holidays!





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Old Nov 17, 2019 | 10:17 AM
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2005 C230 Sport Sedan-6 Speed Manual
Great looking car. The manual transmission cars are hard to find.

I was under the impression that the manual transmission cars did not have transmission cooler lines, but I could be wrong.

I suggest that you look at the oil filler cap and see whether there are any signs of coolant getting into the oil. There will be a substance that is often referred to as "mayonnaise" that is a tell-tale sign. If you have that situation, you may need to replace your head gasket.

Good luck and I hope it is nothing serious.
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Old Nov 17, 2019 | 10:28 AM
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2005 C230K 6 speed
Originally Posted by KevinH2000
Great looking car. The manual transmission cars are hard to find.

I was under the impression that the manual transmission cars did not have transmission cooler lines, but I could be wrong.

I suggest that you look at the oil filler cap and see whether there are any signs of coolant getting into the oil. There will be a substance that is often referred to as "mayonnaise" that is a tell-tale sign. If you have that situation, you may need to replace your head gasket.

Good luck and I hope it is nothing serious.
Unfortunately, it is the head gasket. Just checked the cap.... Thick, brown mayo... definitely a blown head.
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Old Nov 17, 2019 | 10:44 AM
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Sorry to hear that. How long have you had the car? Do you have any recourse with the seller?

Are you planning to repair the car? I noticed Virginia license plates on your car. If you are in Central VA, I can suggest a shop that won't take advantage of you.
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Old Nov 17, 2019 | 11:02 AM
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Originally Posted by KevinH2000
Sorry to hear that. How long have you had the car? Do you have any recourse with the seller?

Are you planning to repair the car? I noticed Virginia license plates on your car. If you are in Central VA, I can suggest a shop that won't take advantage of you.

Definitely plan to keep. With that being stated, I am in the region and would love to check out your resource, highly appreciated.

The car was purchased from Auction. $800. I'm not deterred one bit! Are there any other applications that could possibly fit the 6 speed tranny in these vehicles? I'm aware its RWD... and the kompressor isnt really a powerhouse? Nonetheless. The current one will be repaired until I figure out the logistics of things.
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Old Nov 17, 2019 | 10:35 PM
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I sent you a private message with the phone number of my mechanic.

Fortunately, you didn't pay much for the car so even if the repair is fairly expensive (which I'm fairly sure it will be) you will still have a nice car for less than the cost of 4 average car payments.

Good luck.
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Old Nov 18, 2019 | 10:21 PM
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If there’s going to be that much work and time put into it, if it hasn’t been done - I’d throw a new timing chain on it. Then replace any $12 hoses or cheap parts of the evap/pcv that might be dry rotted. Then triple check the cam leads for pig tail extensions...

Agree, great looking car with factory xenon and a manual. Love it!

Last edited by BF_JC230; Nov 19, 2019 at 08:43 AM.
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Old Nov 19, 2019 | 07:09 AM
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Another issue you will need to check is whether any of the previous owners completed the Takata air bag recall. I suggest that you access this web site: https://www.nhtsa.gov/recalls and put in the Vehicle Identification Number to confirm if it was completed. Your air bag cover and the steering wheel controls look worn, and that is evidence that it may not have been done. It doesn't cost anything for the dealer to do the work and you receive a nice new air bag cover and steering wheel control buttons as an added benefit.
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