nsagir

Can anyone help/shed some light…?

I have a C Class 200 CDi 2005 (facelift W203 5 speed auto Gearbox).
Recently on occasions I have been experiencing problems with the gearbox. The car seems to get stuck in a specific gear and won’t allow any automatic or tip-tronic gear change, even if I put my foot down on the accelerator to the point where I am pressing the button underneath the accelerator pedal the gears won’t change.
It seems like it goes into limp mode. The tiptronic doesn’t work as well when this happens. When this is happening when I put it into neutral and reverse it jumps which doesn’t feel right and doesn’t happen when the gearbox is fine. Once I switch the car on and off it seems to be working perfectly fine. It only seems to do this when I am driving local as motorway once I am in 5th gear it’s not a problem.

Any ideas? I had the gearbox serviced about a year ago changing the filter and oil (I did use genuine Mercedes parts).

Any help would be much appreciated.

Carsy

How many Km has the car done ?

nsagir

The car has done 105k miles.

Carsy

Can anyone help this patient man ?

Carsy

bump

WhirlPool

Do you get any warnings / lights at the instrument panel?
Did you take it to the garage for a STAR diagnostics? any codes popped there?

I have a C200 CDI 2005 and it sounds like it might be gear sensor or ECU needs reprogramming. I had my ECU reprogrammed cause of weird error codes and occasional limp mode with no warnings.

BTW, where are you from?

Glyn M Ruck

The car is going into limp mode to protect the transmission. It comes out of limp when you reboot the TCU by restarting. Make sure that the oil cooler in the bottom of the radiator is not externally clogged with crap.

Please check for stored codes with an OBDII scanner.

Check fluid level in the transmission. Might be low or getting too hot. 99% of problems are fluid level related.
Check electrohydraulic bush on the front RHS diagonal of the transmission for oil leaking past the o rings. If oil gets onto the TCU harness it can cause all sorts of trouble & ultimately wick oil up the harness to the TCU which is under the passenger kick plate. The replacement bush with new o rings is an $8 part. If leaking we can tell you how to replace. Common problem.

Glyn M Ruck

See 115



https://mbworld.org/forums/attachmen...e-campaign.pdf

http://www.installuniversity.com/mb/...ans_oring.html

Javvy

glyn beat me to it........this is it my man...replace/check this and also chcek the harness for any oil creep, when I had this issue I was lucky the dealer ship did it for free, but ever since then I have 2 spare and one is awlays sitting in my car just in case........

javvy

Glyn M Ruck

Yeah - I have a spare lying right here on my computer stand. P/N A 203 540 02 53

DEREK ASHURST

I HAVE 220I DIESEL W REG. IS NOT CHANGING UP ANY IDEAS THAT CAN CAUSE THIS PROPLEM
DEREK

allahw5

A friend had exactly the same symptoms with his E200 automatic gearbox.

The solution was nothing to do with the gearbox itself. In fact it was due to the cars battery being 7 years old and its voltage had dropped. With this battery the car started up fine and all the usual electrical component worked well.

However the gearbox is computer controlled and losses to voltage at the battery
caused his gearbox problems.

The fitment of a new battery cured all of the gearbox malfunctions.This new battery was fitted approx 2 years ago and the gearbox operation has been perfect ever since.

Glyn M Ruck

A bad battery can cause TCU problems but this is seldom the problem with the 722.6

dj_rzn

I had the same problem with my 722.6 transmission (C220 CDI), goes into limp mode (exactly as described into first post). The solution was replacing the hydraulic block in the transmission. (I don't know if that is the correct word, but in my language is "bloc hidraulic")

dannyculling

my car c220 has the same problem it was the gear selcotor module failing i am getting one tomorrow second hand does anyone know if it needs to be coded or will it work straight away

shavinder singh

sir i am having c200 cdi 2001 my car has stcked in first gear and trip-tonic transmission is also not working
what could be the fault...
please gv me a suggeston

cvx

Get your car to shop/indy and read the codes with STAR (and only STAR, no generic cheap craps).

If its the gear selector, see my thread for DIY. I have same car than you

https://mbworld.org/forums/c-class-w...ode-p1856.html

D_BRENNAN

Hi All,


Jumping in here.. I have pulled my 2002 model apart due to this issue, tracked all wireing. Nothing to do with oil change, filters, rads etc. If you lift up the gear stick unit you will see the gear selector.. You will also see a small unit that slots into the Gear selector with about 4/5 wires going into the unit, hard explain.. But it is like a narrow plug that slots into the module. This is where the problem lies. If you get a tool and push the connected piece to the right and hold it there, switch on your ignition, you will see P R N D and the tip tronic will also work.. If you take the toll away you will lose the gears again.


I currently have a wedge holding the connected piece to the right/ it also works to the left but this will give you the gears and away you go. It is a connection fault that is creating low voltage....


Hope this helps, if I can explain better please ask!

cvx

Are you talking about the black small tiptronic module? That module can be seen in my DIY thread after you take the selector housing off.

https://mbworld.org/forums/c-class-w...ode-p1856.html

It is easy part to replace, just plug and play. I accidentally bought that too when fixing my transmission and it cost only about $40 from ebay.

ella1988

Having a similar problem. In 1996 c200. Jolts heavily when going into gear and will not change out of 1st gear when driving along. Any suggestions of possible solutions would be greatly appreciated.

Svartbaken

Hi.
I am a new member so dont shoot me if I ask the wrong questions...
I have recently bought a Merc C200 cdi saloon 2001 model with automatic transmission. Nice car, good handling and everything (the car has done 170000 km). But it has these issues with the transmission and it seems to be as you have wrote in this tread. It works fine, but the next second it does not. All gears works, it does not jam in ex the first or second or anything like that, but the transmission seems to shift to early. When the car is rolling the transmission start to shift gears when the engine is at some 1500 rpm. This can not be correct??
I have also noticed that when the transmission is not working properly the engine wont rev up for more than 3500 rpm. If I restart the engine the engine revs goes all up to the limit and the transmission works properly. There is no pattern in when these problems occures. So, who can explain to me what this is and how I am going to fix it?

Plutoe

Remember that over time the MB transmissions self adapt to your driving style and if you are a new owner of an older vehicle you have inherited the shift patterns of the previous owner(longer\shorter shifts).

Before you wet your pants, read the manual or the forum stickies and preform the transmission shift reset that will revert the shift pattern to the factory settings----


Now do you notice a difference-------Now the transmission will learn your shift patterns quicker.This all assumes that you have checked fluid levels and on fluid egress into the control module(very rare)

If over time(weeks) the situation does not improve, I regret that there may be electro\mechanical issues with the transmission and then I would get the transmission scaned with DAS.

donald12

hi i have a w203 2003 manual somthing strange from yesterday when i go on 1 gear it go out alone this doesent hapen with other gears thnx