Blueyes1971
Senior Member
- Joined
- Dec 3, 2010
- Messages
- 238
- Reaction score
- 37
- Location
- Midlands
- Your Mercedes
- 2002 ML270 CDI Facelift
hi again all..
So I was in cruise control doing 50mph when the revs surged and dropped to tickover.
Lucky I managed to coast safely to a stop and discovered engine running fine but although I can change gears with the selector, neither reverse or drive will actually engage.
Also, in park or neutral , I can Rev engine as normal to any degree but in reverse or drive the revs are restricted to 1000rpm.
I have over the past few months experienced a little slipping into the higher gears if I put my foot down a little but this final event happened with no warning , no noise etc ...simply disengaged.
Also there is no noise to speak of when I try selecting gears now either.
For a long time prior to this last event when selecting reverse, there was a pause and sometimes a small clunk as it engaged.
The selector rod from the gearstick if you will to the transmission is properly connected at least on the exterior of the transmission and the rod bush is present and intact with little or no play/slop
I have had the car diagnosed and the codes discovered are:
P2600 LOW VOLTAGE TO CURCUIT 87 TOO LOW
P4404 THE CAN SIGNAL FROM COMPONENT S9/1(BRAKE LAMP SWITCH) OF THE TRACTION SYSTEM IS IMPLAUSIBLE.
P2502 GEAR IMPLAUSIBLE OR TRANSMISSION SLIPPING
P2500 TRANSMISSION HAS IMPERMISSIBLE TRANSMISSION RATIO.
Hopefully this is not fatal and if so I will buy a used trans and rebuild this one in my own time, but would like any advice or experience from you guys as to what is or may be going on here.
I will be fitting a new brake switch in the coming days as I have one on order.
Another thing to bear in mind is I had conductor plate and socket replaced due to limp in 2nd gear done less than 20,000 miles ago...at a cost of £960. They did other trans related stiff also of course.
I've not investigated further due to the weather here in Leicestershire at the moment..kinda working between the rain and work so positive and productive help would be grately received.
Thanks...Kevin
So I was in cruise control doing 50mph when the revs surged and dropped to tickover.
Lucky I managed to coast safely to a stop and discovered engine running fine but although I can change gears with the selector, neither reverse or drive will actually engage.
Also, in park or neutral , I can Rev engine as normal to any degree but in reverse or drive the revs are restricted to 1000rpm.
I have over the past few months experienced a little slipping into the higher gears if I put my foot down a little but this final event happened with no warning , no noise etc ...simply disengaged.
Also there is no noise to speak of when I try selecting gears now either.
For a long time prior to this last event when selecting reverse, there was a pause and sometimes a small clunk as it engaged.
The selector rod from the gearstick if you will to the transmission is properly connected at least on the exterior of the transmission and the rod bush is present and intact with little or no play/slop
I have had the car diagnosed and the codes discovered are:
P2600 LOW VOLTAGE TO CURCUIT 87 TOO LOW
P4404 THE CAN SIGNAL FROM COMPONENT S9/1(BRAKE LAMP SWITCH) OF THE TRACTION SYSTEM IS IMPLAUSIBLE.
P2502 GEAR IMPLAUSIBLE OR TRANSMISSION SLIPPING
P2500 TRANSMISSION HAS IMPERMISSIBLE TRANSMISSION RATIO.
Hopefully this is not fatal and if so I will buy a used trans and rebuild this one in my own time, but would like any advice or experience from you guys as to what is or may be going on here.
I will be fitting a new brake switch in the coming days as I have one on order.
Another thing to bear in mind is I had conductor plate and socket replaced due to limp in 2nd gear done less than 20,000 miles ago...at a cost of £960. They did other trans related stiff also of course.
I've not investigated further due to the weather here in Leicestershire at the moment..kinda working between the rain and work so positive and productive help would be grately received.
Thanks...Kevin