Anybody encounter this? Car has less than 63000 miles, transmission already done?

__________________
'85 300D Cal 280,000 miles
'14 GLK 350 60000 miles

My brother had a 06 C230 Sport, so I familiar with the 722.9 and its issue. P0717 is the Input Sensor. Which is in the valve body.. So it makes it more expensive than it has to be. This was a known issue for the 722.9, but not every one was affected.

Just like Jake said it is more than likely a speed sensor on the conductor plate on top of the valve body. This error is common on the 722.6 and it happens around 100k to 200k miles.

If I were in your shoes, I would contact Sun Valley Transmission-they know what they are doing with Mercedes Transmissions, and they will probably fix your problem at a fraction of the cost than the dealer.

Contact them. They are good honest people..

Sun Valley Mercedes Transmissions

Martin

Yes, Sun Valley is very reputable around the forums. I have seen your issue happen sometimes around as early as 40,000 miles. Disappointing it didn't make a recall. If you choose to have the dealer do it, it will cost total around $1800.00.

__________________
Only diesels in this driveway.
2005 E320 CDI 243k Black/Black
2008 Chevy 3500HD Duramax 340k
2004 Chevy 2500HD Duramax 220k

722.9 conductor plate replacement will run you ~$1400 at my dealership. Simple job if you know what you're doing. Potential nightmare if you don't.

Should i bring the car to the dealer or an independent MB mechanic? Car has an extended warranty. Any one have experience with extended warranties and transmission problems?

__________________
'85 300D Cal 280,000 miles
'14 GLK 350 60000 miles

Is that $1800 out the door price? I wasnt expecting this problem this early. A transmission oil and filter change cost a little less than $300 at the dealership i go to.

__________________
'85 300D Cal 280,000 miles
'14 GLK 350 60000 miles

I doubt they will cover it. You might get lucky though. If they don't, take it to an indy who knows what he's doing.

This issue is usually caused by the graphite deposits, so it makes it seem easy like a transmission flush will fix it. It doesn't though, so even if you change the fluid, you'll still have the valve body issue. Don't waste your money. Someone is selling a similar car privately and had this same issue. It cost them around $1500.00 to have it replaced. Also, when you have this replaced make sure they do the adaptions. If they don't that it'll be very quirky again.

All the after-market warranty companies I deal with cover this repair. I'd recommend having a dealer do the job but then again I'm biased. Regardless of where you go, they'll need an SDS. Bolting the parts on is easy. Programming on the other hand, is usually where the fun starts.

Thanks for all your input. Car is in the dealer right now. They forwarded the diagnosis to the insurance company. Hopefully everything works out.

__________________
'85 300D Cal 280,000 miles
'14 GLK 350 60000 miles

My 2004 S430 [VGS1] with only 42,000 miles has the P0717 code error now.

Thankfully more independent shops are adept to do the work; and a lot are dedicated to rebuilding the valve body and conductor plate for other shops and (Advanced) DYIers.