Hi guys i need your help .I have oil in the coolant tank weeks ago the problem was the transmission cooler i fixed it then now again i have oil in the tank. Could it be the transmission oil cooler leaking again? or its head gasket?
is there a engine oil cooler for the x308 or it doesn't have one?

Thank you.

 

Have you done a compression test?
Unless its a 3rd party oil cooler, no, there isn't one.
There is a definitive difference between oil and trans fluid in your coolant fluid.
....Trans fluid will be a light pink.
....Oil will be a creamy white.
Have you checked your oil and trans fluid levels? Because if you have either in your coolant, you can assuredly have coolant in either of them....and that's not good in any case.

 

The transmission fluid is low . The oil in the coolant tank was creamy white! But the engine is clean when i remove the oil cap cant see any white spots. The zf 5 color is like engine oil color its not dyeid with red color so could it be the transmission fluid?

 

 

It's often the detail that's missing that's the most important. Has there been an overheat?

That looks like engine oil from a blown head gasket to me but, as Highhorse asked/suggested, don't guess - do a compression test. It's not going to go away and can only get worse.

Graham