Autolevel61

I used an app called Carly for Mercedes. It gave me a pretty good diagnostic on my car via obd reader. I attached a code related to the transmission. I sometimes feel a clunk when letting off the gas but only when I'm sport mode. When in comfort mode it's pretty much normal to me. Worried this code means valve body or something related needs replacing. With the amount of miles I have (175k ish) I'm told replacing trans fluid could cause issues. Any advice?

F1Fan

Easiest thing to do is a fluid change and also replace the transmission mount.

Autolevel61

Don't you need a special machine to pump fluid in since there is no dip stick? I have a 2009.

tjts1

It depends.

Maroc_Specops

Probably this unit u need. Specifically a speed sensor.

Greetsz

Autolevel61

What's that cost? lol plus labor

MBENZTECH

If you have a 7 speed transmission, then you will need a new conductor plate. Best thing to do is either take it to the dealer or find an indi shop that does Mercedes. Here is the catch, if you go to the indi shop, they will need to be licensed through NASTF in order to buy the conductor plate. I do these plates for $1300 out the door. Reman conductor plate, filter, pan gasket, valve body bolts, pan bolts, fluid, programming and coding.

Maroc_Specops

They need no programming or coding. 1300 is ripoff. The part is 200 dollars. Plus oils filter and gasket about 150. And labor is 3 hours max. 500 dollars is right.

1300 dollars sounds like a ripp off 1st class m8.

Greetsz

MBENZTECH

Do you even know what you are talking about? I am talking about the 722.9 transmission control module/conductor plate. Just the re-manufactured conductor plate alone is $440 list price and it does require programming, SCN coding, personalizing and activation!!!

Maroc_Specops

5 or 7 speeds need no coding friend. Plug 'n play. 1300 dollars is in my opinion 1st class ripoff.

MBENZTECH

Again, I could care less about your opinion. Do your research and you will find out!!!! I am just giving the OP needed info on what his choices of repair are. Dealership price on replacing the 722.9 conductor plate is over $2k. Just because you change the oil and filter on your car doesn't make you an expert. So say what ever you want to say, I am just going to ignore you.

AUTOdidact

I would keep it simple (and cheap) at the beginning - check the sensing surface for metal abrasion and replace the Y3/8n2 speed sensor. You find videos on YT. Before draining the fluid be sure you'll be able to get it back in

In case your E350 is a 4matic equipped with the 5-speed: replace conductor plate (cheap, no TCU built in) and "pilot bushing". Refilling no problem there.

Autolevel61

How would I know if I have a 7 speed I have a 2009 sport

Autolevel61

How do I refill?

AUTOdidact

You have one for sure if your car is a v6/ v8 and not AWD (4matic).

Of course you can also count the number of shifts

AUTOdidact

7 speed (722.9): refilling is from underneith directly at the drain pan, hand pump + adapter required - search at eBay
5 speed (722.6): open hood, remove engine cover + intake assembly and use tube behind the engine

MBENZTECH

If it's a 2009 E350 (NON 4MATIC)...... Then for sure you have a 722.9 (7G-tronic) transmission.

Autolevel61

I have a 4matic. So does that change everything?

tjts1

LOL yup

Autolevel61

So now we know it's a 722.6 is the conductor plate still the culprit?

tjts1

It's most likely the TCC lockup solenoid. Of the six solenoids in the 722.6 the TCC solenoid sees the most wear. Unlike most automatic transmissions the 722.6 locks up the torque converter in every gear. The TCC solenoid is not an expensive part I got it for $28. But it's one of those "while you're in there" situations. If you're going to replace the TCC solenoid you might as well also replace the conductor plate at the same time and the filter and there are some rebuild kits for the valve body that you should probably do at the same time too. I did mine at 174000 miles.

tjts1

722.6 valve body repair https://imgur.com/a/8X4RT75

AUTOdidact

P2767 code has NOTHING to do with the lockup solenoid, it surely refers to the speed sensor.

At the 5-speed, the sensor is part of and sits in the middle of the (inexpensive) conductor plate - so simply change the plate an the problem should have gone. All the solenoids can be reused.

PS: You can see the built-in speed sensors on the foto in post #5 (shows a 5-speed conductor plate) - the two bumps on the rounded part on left side.

tjts1

This is wrong, don't listen to this guy. He is completely clueless.
Inever said anything about that code, I was talking about the jerkyness. DO NOT reuse the TCC solenoid at 175k miles.

Maroc_Specops

He has is answer from the 3rd post. Watch out guys for rip offs. We should help each other with free advice, not ripping guys off for a couple of grands lol.

Greetingsz