Help! 2011 E550C Issues.

You can reset the transmission adaptation, there is a simple process you can go through in your car to do this -- someone can get you the sequence. This may resolve your transmission issue once it re-learns your driving style.

How many original miles on the car including your 6k miles? brakes and rotors wearing out are a product of the driver's braking style.... this can vary from car to car.

I have not had issues with sirius in my 2k14 .. they need to address this in your car.. you can also have sirius re-set the signal to your car, you can call them and you'll have to have the car out in the open outside a garage and you'll need your Sirius radio ID, channel 0 or channel 1 on your radio. Call their 800 number, it may solve your connection issues

Agreed, rotors should last longer -- how do you know you need new rotors -- are they warped, are they squeaking/grinding? The pads should not have gone below 10% in 6k miles...

I would keep pushing the transmission issue, and then get corporate MBUSA involved and this will light a fire under your dealership's ass to find a real solution. That's what I'm doing with my 2k14 that's been in the shop for 2 weeks with a bad transmission.

best advice I ever got was to involve MBUSA (new jersey, you can google the phone number, customer care division)

Island -

It was roughly, intermittently, downshifting from 5th to 4th gear, and occasional rough upshifts in other gear pairs... the biggest and most prevalent and concerning issue was this rough 5th-->4th downshift

I would have sirius reset the signal -- try that -- do you have any radio devices in the vehicle? I have a baby monitor that uses radio frequency to transmit the signal to the video monitor and that would interfere with the sirius in my wife's Infiniti -- when we turned the monitor off, sirius was perfect, when we turned it on, sirius would keep "searching for signal" and be spotty with the connection. It took a while to figure that one out.

Glad they found the cause of the leak -- guess CPO isn't what they claimed it was -- but perhaps the leak occurred after you purchased the CPO vehicle?

You shouldn't have had to pay anything for the rotors/pads -- but $330 bought you at least 20-30k of trouble free braking .. so that's good.

The sirius in my 2k14 is flawless... wonder if they changed something...

island -- they're saying I have a defective valve body (a part that it's in the bottom of the transmission case) -- they'll have the part replaced by thursday and will retest to see if I have harsh shifting... will update as we go, thanks for your interest