Mercedes c class with tiptonic gearbox. It seems to have got stuck in a low gear when I slowed down for a roundabout. When I accelerated to 50/60 mph, the rev counter was way too high and no auto gear change could be heard. Tried knocking the tiptronic into gear, but it wouldn't respond. Once I stopped the car and started it up again, it seemed OK, no malfunctions were reported. Any ideas or solutions will be gratefully received. :->

Sounds like the transmission is stuck in "Limp Home " mode. Does it reset when you turn off the ignition ?
If it does most likely you have a typical problem of oil in the wiring loom, it seeps through the gearbox connector and through capillary action ends up in the transmission control unit. Sometimes cleaning it up with electrical cleaner works. They sell a kit to prevent it happening in the future, simple to fix.
If it doesn't reset it could still be the above problem.Best get it to a dealer or a good indie with diagnostic software. Its unlikely to be a transmission fault.

Is the gearbox in Winter mode by any chance. Try the switch on the console.

sounds like a mass air flow senser, this senses load on the engine,you can buy an insert which is a quarter the price of a new unit. the e-class gave a lot of trouble with this senser.

Dear kev4,

The problem seems to be originating from your gearbox. The gear box has two main components that convert the torque of the engine to the tailshaft; the 'torque converter' and the 'bands' within the gearbox. If at higher rpm the car starts to rev higher and slow down then it would suggest that one of these two components are slipping or not functioning correctly.

To fix this problem you will have to take your car to a gearbox specialist who with either reccomend a replacement gearbox, a overhaul of the orriginal gearbox or if you get lucky a new torque converter. Unfortunately this car be a costly opperation but is quite important in reguards to the life of the vehicle.

Reguards luke.

check your gearbox oil level sound like gearbox is in limp mode and may need a service

it should be in 2nd gear your gearbox is in limp mode need to have it looked at a.s.a.p ( the oil level may low)

mercedes c220 cdi 2004 140k done gets stuck in gear then have to turn of ignition to get it working again. had recently had the gearbox serviced

automatic gear on merecedes e220 stuck in first will not change up when accelerating could any one tell me how to get this fixed please

have yor dealer check for updated software for your transmission or engine control modules

If you take it to mercedes they will charge £3500 and will replace the gearbox, Alternatively you can change the shifter valve £25, new sump and filter as they have changed, fit a magnet inside the gearbox as the early A didnt have one. Fresh oil and see how you get on, the control unit for the gearbox sits inside the gearbox £1000 roughly for a new one but it has to come from mercedes in germany where it is coded to your chassis number, 2nd control units are not an option!!!!!!!
jib
www.mercanic.co.uk