Transmission Filter and Fluid replacement service time


New member
Hello Guys,

I have a 2010 GLK 350 4Matic and she has 133K on the dash. She needs the tranny fluid and filter service done. From what I see the process is pretty simple but I have a few questions.
1. Who and where should I buy the kit from? Don?t want to buy inferior parts (don?t want to be raked over the coals either).
2. How long does the gasket take to seal so I don?t have leakage?
3. Would it be best to add permatex to the gasket?
4. Should I replace the mechatronics sleeve while I have the tranny fluid pan down?
That?s it and thanks in advance!