one question can a merc dealer

[arthur_clark]

one question ? can a merc dealer reprogram a secound hand TCU that has all the same modle numbers as mine and what would you say is the sucsess rate is (ok i know technicaly two questions )

 

[LostKiwi]

They probably can but won't.
Many garages and dealers in particular won't touch parts they don't source.

 

[arthur_clark]

They probably can but won't.
Many garages and dealers in particular won't touch parts they don't source.

i have a dealer that is prepared to have a go £230 then if it dose not work i still have to pay but they will then quote me for a new one fitted ( bit of a one of favour for an x worker ), at a guess the new one will come in around the £700 mark

 

[star]

What gearbox/car? Most tcu’s are locked to car, so a secondhand one would have to be virginized and then coded.

 

[arthur_clark]

What gearbox/car? Most tcu’s are locked to car, so a secondhand one would have to be virginized and then coded.

5 speed auto 722.6 2008 c200 cdi

 

[star]

Ok, an early 5 speed, don’t get problems with separate tcu’s. I can’t remember if a s/hand will just plug and play. What’s the problem?

 

[arthur_clark]

Ok, an early 5 speed, don’t get problems with separate tcu’s. I can’t remember if a s/hand will just plug and play. What’s the problem?

well it did plug and play a little bit it ran but only in 2nd and 3rd gear (D-mode) no paddle shift in manual, and not in limp mode, my old one would not let me select sport manual or comfort on the switch gone into limp mode, i put the secound hand one in and got my S-M-C button back on,i tried new conductor plate before the TCM.

 

[arthur_clark]

OH and the secoundhand one destroid my fuel consumption 25 miles on £10

 

[star]

Did you get any fault codes before you changed anything?

 

[arthur_clark]

Did you get any fault codes before you changed anything?

y3/6y1----y3/8y2----y3/9y1---p0715 --0748 i know there just generic codes

 

[star]

Trouble is sometimes generic code readers lead you up the wrong path with wrong codes.

 

[arthur_clark]

Trouble is sometimes generic code readers lead you up the wrong path with wrong codes.

tell me about it i'm £300 light so far and nothing to show for it

 

[V6Matty]

Where are you located, maybe someone here can recommend a good trusted Indy with Star to get things read and fault find rather than throwing parts at the problem

 

[arthur_clark]

Where are you located, maybe someone here can recommend a good trusted Indy with Star to get things read and fault find rather than throwing parts at the problem

sorry mate its been on the "star" readers but thanks anyway.trouble is the TCU can hide.

 

[V6Matty]

sorry mate its been on the "star" readers but thanks anyway.trouble is the TCU can hide.

Just because it’s had the codes read on Star doesn’t always mean they have understood what is being shown, an error code doesn’t always mean that that single part has/is failing only that it needs further investigation to find the root cause, for example the fault shows on the TCU but on delving into it further it’s actually another component that is sending spurious signals, only in doing the further tracing will the actual fault be found

 

[arthur_clark]

Just because it’s had the codes read on Star doesn’t always mean they have understood what is being shown, an error code doesn’t always mean that that single part has/is failing only that it needs further investigation to find the root cause, for example the fault shows on the TCU but on delving into it further it’s actually another component that is sending spurious signals, only in doing the further tracing will the actual fault be found

it did have a turbine speed sensor fault but that was cleared in the early days of my problems and has not come back and not showing on the star reader

 

[V6Matty]

What are the live values saying

 

[arthur_clark]

mercedes ulverston had my car three weeks now and still no sing of my new TCM, im getting a bit sick of it now.

 

[Botus]

dealers can add new stuff to cars at big prices - they are seldom any good at fixing stuff or doing it cheaply...

after a few years people find ways around the deliberate ideas to stop home/independent garages doing the job... often those in the know can do the job but its hard work finding where they are to get the job done...

if you have more than one fault it tends to be painful and here great indepenant specialist can save the day. very few out there but often worth using them rather than so one close by

 

[arthur_clark]

so finaly got the car back today new TCM FITTED . drove 16 miles all seemed ok so stopped to fuel up set of again and got yellow caution light on, engine light on, traction not available ,could it be the drop in tank presure?