Mercedes C 270 Cdi Tiptronic Problem

[GARY_470]

Having problems with my tiptronic gearbox on my 2002 Mercedes C 270 CDI. When changing to higher gears the dash board gear indicator changes but the cars gearbox does'nt change however it drops down gears straight away when downshifting. With this not working properly the car is in automatic mode. Has anyone had this problem or know any way of fixing it.

[GARY_470]

Only had the car for 2 weeks and did'nt get a manual with it , ive just done a search on Tiptronic and read that they have a manual mode Can anyone let me know how to put the car in this manual mode so I can check to see if the tiptronic is working okay , I just thought that you put the car in drive mode and just tap the gear lever left or right to change up or down. Like ive said above at the moment the car doesnt change up a gear in the gearbox when using the gear lever but does on the dash indicator but it changes down gears okay.

Also when I turn the car off a fault indicator comes up on the dash board , how can I find out what the fault is.

[fuzzer]

Originally Posted by GARY_470

Having problems with my tiptronic gearbox on my 2002 Mercedes C 270 CDI. When changing to higher gears the dash board gear indicator changes but the cars gearbox does'nt change however it drops down gears straight away when downshifting. With this not working properly the car is in automatic mode. Has anyone had this problem or know any way of fixing it.

just cause you tip up, doesnt mean the car is going to change streight away. Try tipping up and holding it

[BonzoDog]

My car is a little later but push it to the left and let go it drops down one gear and is in manual mode. Hold it to the left and it will drop down as far as is safe. Pull it to the right and the same applies. In any position the car will override so that you don't over rev.

[Glenn Smith]

Originally Posted by GARY_470

Having problems with my tiptronic gearbox on my 2002 Mercedes C 270 CDI. When changing to higher gears the dash board gear indicator changes but the cars gearbox does'nt change however it drops down gears straight away when downshifting. With this not working properly the car is in automatic mode. Has anyone had this problem or know any way of fixing it.

This is normal behaviour with the tipshift gearbox, the indicator doesn't indicate the gear it's in, only the highest gear it will select i.e. if you tip once to the left it will indicate 4, this means 1st 2nd 3rd and 4th will operate automaticaly as normal but 5th won't. if you push and hold to the left for a short time the box will indicate the gear selected at the time if 5th is selected it will indicate 4, pushing to the right briefly will indicate the next gear up i.e. if you are indicating 3 it will move to 4, push and hold will put back into D. (regardless of gear indicated) The tipshift is only meant as a means of holding a lower gear say for hilly or twisty roads to prevent upward shifts that are not required allowing you to use the engine power to balance the car better through turns etc.

[Glenn Smith]

Originally Posted by BonzoDog

. In any position the car will override so that you don't over rev.

Not strictly true, in down changes yes, in up no, try putting in 2nd floor it and hold it there, it will bounce off the rev limiter!!!

[portzy]

From memory the five speed box from that year is always in what you might call "manual" mode via the moving and / or holding the stick left / right.

There are no other selection buttons next to the selector other than S & W, unlike the 7 Gtronic which has M if you also have the steering wheel buttons or padlles.

Moving the stick momentarilly to the left takes you down a gear and restricts the shift programme to that gear, i.e. if you have gone to 4th you should see 4 in the display and the box will not shift up further than 4th unless, you move AND HOLD the stick to the right then all the gears available in D are available again. It will, of course, shift down if you leave it alone but wont shift up beyond 4th.

Moving and HOLDING the stick to the left selects the best gear for acceleration at that point in time, whatever that gear may be so, it could in theory drop more than one gear to get you there.

Did'nt you say there was a dash warning light of some sort coming on?

Portzy.

[GARY_470]

Yes mate everytime I turn the car off it flashes 1 fault on the dash board.

[Rory]

Originally Posted by Glenn Smith

Not strictly true, in down changes yes, in up no, try putting in 2nd floor it and hold it there, it will bounce off the rev limiter!!!

Mine (like the OP's) is a C270CDi, and it certainly DOES upshift on it's own if held in a lower gear. It threw me at first, 'cos it up-shifts pretty early - it doesn't go anywhere near the red-line, never mind the rev limiter (if there is one a diesel!).

[Glenn Smith]

Originally Posted by Rory

Mine (like the OP's) is a C270CDi, and it certainly DOES upshift on it's own if held in a lower gear. It threw me at first, 'cos it up-shifts pretty early - it doesn't go anywhere near the red-line, never mind the rev limiter (if there is one a diesel!).

Can't see the point if thats the case, mines a c230k and will not change up beyond the indicated gear, yes it will change up as normal in the lower gears can't see the point of abox that limits the upshift and then changes up anyway!!! I'm not saying it doesn't as electronic box's can be programmed to do anything.

[Glenn Smith]

Originally Posted by portzy

Moving the stick momentarilly to the left takes you down a gear and restricts the shift programme to that gear, i.e. if you have gone to 4th you should see 4 in the display and the box will not shift up further than 4th unless, you move AND HOLD the stick to the right then all the gears available in D are available again. It will, of course, shift down if you leave it alone but wont shift up beyond 4th.

Moving and HOLDING the stick to the left selects the best gear for acceleration at that point in time, whatever that gear may be so, it could in theory drop more than one gear to get you there.

Maybe all these box's are different, mine certainly not as above, it says and does exactly as in handbook, if in D on the display a nudge to the left drops indicator to 4 another nudge drops indicator to 3 and so on, if you nudge to the right from a lower gear it steps up one at a time untill in D, holding to the left will indicate the gear already selected by the box dropping at least one gear if you are in D at the time (road speed permitting) i.e. if the car is in second gear the indicator will show 2 and the box will be limited to auto changes between 1st and 2nd. regardless of gear selected or shown if the the lever is pushed and held to the right then D is selected

[portzy]

Originally Posted by Glenn Smith

Maybe all these box's are different, mine certainly not as above, it says and does exactly as in handbook, if in D on the display a nudge to the left drops indicator to 4 another nudge drops indicator to 3 and so on, if you nudge to the right from a lower gear it steps up one at a time untill in D, holding to the left will indicate the gear already selected by the box dropping at least one gear if you are in D at the time (road speed permitting) i.e. if the car is in second gear the indicator will show 2 and the box will be limited to auto changes between 1st and 2nd. regardless of gear selected or shown if the the lever is pushed and held to the right then D is selected

I aggree, but I think you explained it better than me though. It does sound to me that Gary does have a fault.

Gary, if you didnt get a handbook with the car?, the MB website has access to several owners manuals for current models. In all of them there is a section on the automatic gearbox inc five speed ones. Maybe a few reads of those might shed a bit of light on things so you can decide if yours is behaving as it should or otherwise.

Portzy.