Hi,
Hoping to get some advice and info before I go with the indie suggested option of reconditioning the gearbox.
I have a 2006 CDI220 that I bought just a few weeks back. All seemed well until I drove it on the first cold morning and here is what then happens:
Happens only when the engine is COMPLETELY cold (first 10 mins of driving. Will not happen again until rested for 4-6 hours).
The revs will 'flare' while driving along. EG Drive at a steady 40 MPH and the revs will flare from 10kRPM to 15kRPM. Happens just for a second, then 5-10 seconds later will do it again and so on. Along with this the engine feels as though it either loses power or torque. Again just a for a second and then power is back. It can do this several times in a row or sometimes just the once but it will always keep happening until the engine/gearbox has warmed.
Additionally while cold the gearbox changes are sometime on the harsh side. Not very harsh, but enough that you clearly notice. There is no dashboard light.
The following has been done so far:
Got it hooked up to a STAR machine
Stored code came back as "P250 (or P2500) The transmission has an impermissible transmission ratio"
They recommended gearbox oil and filter change
This was done at their expense and the garage commented to me that the oil was 'mucky and muddy like'
But he felt that this should be of significant help
Drove the car the next morning - all the same.
They referred me to a gearbox specialist (as they believe this is the cause) who said only option is to replace/recondition the gearbox which the dealer will not pay for.
So before I go any further I am looking to see if this is really necessary or are there simpler options that I could opt for? Is there further diag that would help?
Once warm it drives great and I very much enjoy my first ever Merc. But that first ten mins is pretty unbearable and I do not want to cause longer term damage.
Many thanks for your thoughts!
Chris U
Hoping to get some advice and info before I go with the indie suggested option of reconditioning the gearbox.
I have a 2006 CDI220 that I bought just a few weeks back. All seemed well until I drove it on the first cold morning and here is what then happens:
Happens only when the engine is COMPLETELY cold (first 10 mins of driving. Will not happen again until rested for 4-6 hours).
The revs will 'flare' while driving along. EG Drive at a steady 40 MPH and the revs will flare from 10kRPM to 15kRPM. Happens just for a second, then 5-10 seconds later will do it again and so on. Along with this the engine feels as though it either loses power or torque. Again just a for a second and then power is back. It can do this several times in a row or sometimes just the once but it will always keep happening until the engine/gearbox has warmed.
Additionally while cold the gearbox changes are sometime on the harsh side. Not very harsh, but enough that you clearly notice. There is no dashboard light.
The following has been done so far:
Got it hooked up to a STAR machine
Stored code came back as "P250 (or P2500) The transmission has an impermissible transmission ratio"
They recommended gearbox oil and filter change
This was done at their expense and the garage commented to me that the oil was 'mucky and muddy like'
But he felt that this should be of significant help
Drove the car the next morning - all the same.
They referred me to a gearbox specialist (as they believe this is the cause) who said only option is to replace/recondition the gearbox which the dealer will not pay for.
So before I go any further I am looking to see if this is really necessary or are there simpler options that I could opt for? Is there further diag that would help?
Once warm it drives great and I very much enjoy my first ever Merc. But that first ten mins is pretty unbearable and I do not want to cause longer term damage.
Many thanks for your thoughts!
Chris U