Marcosvg

As I say in the title, after much searching I have detected a small leak of acite in the lower part of the engine, under the alternator, someone can help me to dentify the piece, the leak seems to be in the joint of a pipe, thank you.

mike919

Pretty sure that's the transmission cooler lines, the block it's connected to is the thermostat. I've had a leak here before also.

Marcosvg

thank you for leading the way.

Marcosvg

Once I found the code of the part corresponds to the Automatic Transmission Oil Thermostat, I think I may have lost atf from the gearbox or I am in an error, I appreciate any help.

Mikey178

For reference in the future, Part number is A1645010265. Part is called Transmission Oil Cooler Line & Pipe Hoses.

Family members 2012 ML350 had this same leak (Found when doing the AEM Recall) but there is a specific flare connection needed for the hoses. Ended up having the dealer do the work and replace (Approx $700 CAD). They also identified a few other leak points (Intercooler hoses, turbo intake, air filter gaskets, vacuum pump) which I ended up doing at home. To date no further leaks have been observed.