PatrickHogan
New Member
I'm hoping someone here will have encountered this issue before and knows how best to fix it
I have noticed an oil leak coming from the Gearbox Transmission Oil Cooler - part number A0995002300 (seems to be similar to A0995001100 used on the W212 also)
The car is a W204 C220d auto 2014 with 150k miles.
Auto gearbox was serviced by Mercedes main dealer at 100k miles.
See attached photos.
The oil cooler naturally leans back slightly forwards, away from the engine.
The oil pools on the top of the cooler itself.
2 metal pipes and 2 rubber hoses connect to the cooler.
I suspect that an o-ring has perished somewhere and is allowing oil to trickle down.
I cleaned up the fluid from the top of the cooler with a paper towel, but it returns again after a long drive.
1. Can the o-rings be replaced? Or do I need a new oil cooler and/or hoses?
2. Does anyone have a workshop guide on how to replace this part. Is it a DIY job or more involved?
3. Does transmission oil flow through these hoses whith the engine cold and off?
4. I assume that the gearbox oil would need to be topped up after any work is carried out. Where/how do I check this?
Do I need a special dipstick and is it temperature dependent?
Thanks in advance
I have noticed an oil leak coming from the Gearbox Transmission Oil Cooler - part number A0995002300 (seems to be similar to A0995001100 used on the W212 also)
The car is a W204 C220d auto 2014 with 150k miles.
Auto gearbox was serviced by Mercedes main dealer at 100k miles.
See attached photos.
The oil cooler naturally leans back slightly forwards, away from the engine.
The oil pools on the top of the cooler itself.
2 metal pipes and 2 rubber hoses connect to the cooler.
I suspect that an o-ring has perished somewhere and is allowing oil to trickle down.
I cleaned up the fluid from the top of the cooler with a paper towel, but it returns again after a long drive.
1. Can the o-rings be replaced? Or do I need a new oil cooler and/or hoses?
2. Does anyone have a workshop guide on how to replace this part. Is it a DIY job or more involved?
3. Does transmission oil flow through these hoses whith the engine cold and off?
4. I assume that the gearbox oil would need to be topped up after any work is carried out. Where/how do I check this?
Do I need a special dipstick and is it temperature dependent?
Thanks in advance