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Hello, first-time MB owner over here. I have tried looking for images but I can't get a good glance to compare.
Are these hoses healthy or are they due to be replaced? Are they even the correct ones? I find it weird that they are skinny at certain angles. My gut feeling tells me something is odd but perhaps this is a MB design.
Do you have the service history of the vehicle and what is its mileage? Is there evidence of a coolant leak in the engine compartment or underneath your vehicle? If you have just acquired the car as preventative maintenance I would drain the coolant and replace all radiator hoses due to the age of the vehicle if it hasn't been done previously. I try to diy as much as possible on my vehicle and have so far replaced the thermostat which failed and the coolant at 90k miles. I'm planning on changing out all the coolant hoses in the spring or summer. In the first photo, there appears to be a depression in the hose but as long as there isn't evidence of a leak, I wouldn't be overly concerned.
Out of curiosity, I went out to my vehicle and checked the hoses you're concerned about. This hose isn't showing the depression that is visible in your hose.
This hose looks similar.
Thanks for taking the time to check for yourself. There is no coolant leak. Although, I have oil getting into my coolant due to a bad oil cooler seal so I am currently in the process of changing the seal and flushing the coolant. Which is mainly why the hoses grabbed my attention.
I forgot to mention the mileage - 108K. I hooked up my Autel MK808 and looked at the service history that was documented in the ECU.
I need more time to study the maintenance history. I did find many entries. I am mainly looking to see if the transmission fluid was changed. I have a slipping 1st to 2nd gear when driving slow or using the shift paddles. Not so much when I give it some throttle. Anyways, another thread for this issue. I do see lots of transmission issues related to solenoids.
Thanks for taking the time to check for yourself. There is no coolant leak. Although, I have oil getting into my coolant due to a bad oil cooler seal so I am currently in the process of changing the seal and flushing the coolant. Which is mainly why the hoses grabbed my attention.
I forgot to mention the mileage - 108K. I hooked up my Autel MK808 and looked at the service history that was documented in the ECU.
I need more time to study the maintenance history. I did find many entries. I am mainly looking to see if the transmission fluid was changed. I have a slipping 1st to 2nd gear when driving slow or using the shift paddles. Not so much when I give it some throttle. Anyways, another thread for this issue. I do see lots of transmission issues related to solenoids.
These vehicles thrive if you follow MB maintenance specs regarding fluids. I would service the trans fluid if you can't ascertain last trans service. MB changed trans fluids type sometime in 2010 to blue type prior fluid was red. Red trans fluid requires 40k intervals and blue requires 70k intervals( I personally change at 50k intervals). Run the vin thru local MB dealer parts counter to determine fluid type. Attached a photo showing how to determine by checking the design of the trans pan but to be safe still verify with vin...
Figure 1 pan would require red fluid
Figure 2 pan would require blue fluid
I will take a look under the car and call the dealer to cross reference.
I know the TCM - solenoids and some other parts tend to go bad. You end up having to replace or repair it. I just hope it ends up being something like components rather than having to replace the entire trans.
I will take a look under the car and call the dealer to cross reference.
I know the TCM - solenoids and some other parts tend to go bad. You end up having to replace or repair it. I just hope it ends up being something like components rather than having to replace the entire trans.
Servicing the trans fluid and filter might resolve your issue if you're not getting trans related codes.
Thanks again. Tomorrow I’m going to create a different thread to avoid hijacking the title of this one. Seems like I have the 40K fluid trans. I can’t imagine service along with fix the issue. Regardless it needs to be done so I guess it’s worth a shot.
Going back to the coolant hoses. I notice mine is pretty much touching the oil cooler. Do you have a plate between or is the hose stiff enough that it doesn’t flex onto the cooler?
Thanks again. Tomorrow I’m going to create a different thread to avoid hijacking the title of this one. Seems like I have the 40K fluid trans. I can’t imagine service along with fix the issue. Regardless it needs to be done so I guess it’s worth a shot.
Going back to the coolant hoses. I notice mine is pretty much touching the oil cooler. Do you have a plate between or is the hose stiff enough that it doesn’t flex onto the cooler?
There is a bracket attached to the coolant hose and oil cooler/oil filter housing preventing the hose from touching the oil cooler.
The hoses definitely shouldn't look collapsed like that. I agree that they should be replaced just based on the age regardless, but it being collapsed is a different issue. Do they go back to their normal shape when you remove the radiator (reservoir) cap? If so, get a new cap. It's supposed to let the cooling system breathe to some extent and may not be working properly.
Does the temperature stay at a good level while driving? It should hover around 90* C
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