BiH430

im having a big problem. i changed transsmition fluid about 2 months ago and now my 430 is stuck in first gear it wont shift. any suggestions would be nice thanks.

blueC230K

Had the same problem 2 years ago and had a flat bed trunk taken to stealer. They said it was the transmission module. It was covered under warranty so I have no clue how much it would cost w/out. Did you purchase an extended warranty?

Don't drive the car in the mean time...


Edit: it sounds like you have a similar problem with this guy

https://mbworld.org/forums/showthrea...e+transmission

tirona

sounds like your car is in limp mode, doesn't mean you need a new tcm. do you have CEL on? get the codes read first, autozone does it for free. could be anything from a speed sensor to who knows what. you could be low on fluid. have your mechanic check the atf level with the mb special dipstick, it has to be in fully operating temperature and car on when checking the level i think. and also tell him to check if the infamous transmission connector/plug is not leaking.

Semikolon

it usually stucks in second when there's something wrong. how long have your car rolled? And how long since the last fluid change? Did you change filter?

You may get a transmission breakdown by changing old fluid, at least when not changing filter...

ohlord

who did the fluid change?
Was it mb spec 722.6 fluid?
Have you check it is at proper level?
Any leaking fluid around the electrical connector on the passenger side of the trans pan?
Spilled anything on the console lately?
Have you tried a reset of the ECU and TCU?
reply to all of the above,before taking it anywhere.
ohlord
and before you go into shock....TCU's as in that link are not 3 grand and if yours is bad can be replaced by DIY(you)

BiH430

ok guys cel is on. just got back from autozone and they got P0715 code it says speed turbine .my local mercedes spec did my fluid change. nothing spilled on the console.i did not reset ecu or tcu.

ohlord

check fluid level and the electrical connector on the trans for leakage both known causes for input/output turbine sensor codes.Short of an actual sensor failure.

did they use a flushing machine perchance?

BiH430

i have no idea what did they use. i feel like they messed up something

tirona

that's the code for the speed sensor, nothing major to worry about. reset the code either with the scanner or by disconnecting the battery. then if code appears back you need to change the sensor (2hr labor max), if not just drive the car. but make sure the connector is not leaking.

BiH430

tirona i disconnected the battery and still getting the cel. i cant drive the car its stuck in first gear. does the speed sensor make the trans not shift?

ohlord

for the input speed sensor?You need to drop the pan after draining the fluid,remove the filter ,the valve body,and the plate that has the output and the input turbine speed sensors on it.
That would take a bit more then 2 hours.And clearing the code is not going to eliminate the problem nor unlock it from 1st gear so he can ignore the issue.
Something is wrong if not the electrical connector leak,the fluid level was improper or they flushed the trans and the accumulated dirt and graphite fouled the sensors.
Get it to the shop to be checked for all of the above and keep your fingers crossed.Maybe it is the shift module failure but coming on the heels of the fluid change would cause one to believe something was not on kilter.
ohlord

Semikolon

I just had a bad revolutionssensor in my transmission, code 109 under EGS. Component Y3/6n3. about 3 hours labor, including the leaking contact and cleaning. Draining and taking down the pan, hydraulic and eletronics takes a maximum of half an hour.
Then some component from the old eletronics plate have to be moved over to the new plate. Clean the accessible areas, reassemble and refill fluid.

tirona

i said about 2 hours because i was quoted labor for two hours by a dealership a while back when i had that code appear. in my case the limp mode went away when i restarted the car, and code never showed back after reset. i changed the tranny fluid + filter a little bit after that and so far so good after a few years.
the input turbine speed sensor is mounted on a plastic plate above the valve body. i think that plate can crack after a while or something like that. i would do a little bit of research and check if you should update any parts while you are there.
did you check the fluid level yet?

ohlord

that must have been a odd dealer i don't think the labor book would show two hours for that job that is less labor then they book for diagnosis of a mass air sensor and r/r
sometimes the reset works looks like in his case it did not so off to the shop he go
either level or fitting or tcu or sensor,I will hedge my bets on this one.Probably level.Hope

BiH430

my car started acting weird after i had trans fluid changed. i had this problem first when i drive the car it would get stuck in first, second,or third gear but when i turn off the car and start again it works fine it did this few times and now its stuck just in first gear.

ohlord

to the wise...........
When something feels wrong and acts wrong,something is probably wrong.
2 months ago it should have been checked for fluid level and scanned for codes.
was your check engine light on this whole time?
What may have been a simple solution may no be not so simple.

"GOT CODES?"

BiH430

yes the check engine light was on even before this i changed MAF sensor and light went off. i took the car to local mercedes mechanic and they say it could be shifter assembly but they are not 100% sure.

ohlord

a place that is sure.If you were sure and they were sure ,then you would know how much it is going to cost.Otherwise they are not a good shop if they are guessing with a very expensive part that can't be returned if they are wrong.

BiH430

the part cost about $300 thats what they said.

tirona

find a good independent shop in nashville that has a lot of experience with mb's. http://www.mercedesshop.com/shopforu...splay.php?f=73

marlboromanG

its a long shot but does there happen to be any issues with the electrical that you can notice? i.e. if you turn on your headlights or interior lights while the car is not running does it seem dimmer or brighter when you have the car running? is your radio not responding correctly? etc.?

Its a long shot but I'll try to keep it short... previous owner had the fluid changed and car stuck in first so I got it for a steal as they were told by MB a new transmission was needed. Coincidently, the fluid change wasnt the problem... the voltage regulator in my alternator happen to go bad and a simple replacement had the girl running and shifting smoother than silk. If you notice any issues with your electrical, look into that. I have a spare code reader if you need to borrow or buy. Good luck, lets get this baby up and running!