I've read a few DIYs on it but I'm still nervous. I really messed up a Jaguar X-type tranny a few years ago when I didn't quite understand the sensitivity of auto trannies and fluid levels.

I noticed my electrical connector o-ring is leaking tranny fluid so I bought the new connector part and figured hey... I might as well drop the pan, change the gasket and filter, and replace only the fluid lost during that. It will dilute the old fluid and, with a new filter already in place, I'll be good to just do pan drains every 5K miles for a few times to get most of the old fluid out.

I bought the filter/gasket/drain plug washer, o-ring connector, tranny fluid and dipstick tool for the '04 SLK32 basically.

I plan to check my level by shooting the pan with an infrared thermo, though that isn't the official right way to do it. It seems a lot of people have had success that way though.

So if anyone has any tips to make me feel better about my upcoming task then please share.