I'm selling my 04 Mercedes c class 270cdi estate this week. I've got a deal agreed (trade in against another car) with a dealer down south & am heading there on wed. The Mercedes has always run flawlessly until tonight on my way into town when I overtook another car the car sort of lost power for a microsecond then recovered but the engine management came on! The car is still running perfectly & was returning 52mpg (oh if only the FFRR would do that) with no unusual noises. Oil levels are perfect, temp is fine, turning off & on makes no difference. Can anyone suggest what I can do? Would disconnecting the battery overnight clear the fault?
Robert. The reason women's minds are cleaner than a mans mind is that women change their minds more often!
When women say fine a mans in deep doodoo as fine has so many meanings.

Try pressing ( and keep pressing) the lock button on the remote in the start position whilst starting the car and turn off ( whilst still holding the lock button ) , this should reset any warnings on the dashboard( it worked with my 2005 E55 )

Good Luck 2005 Audi A8 W12
1978 Mercedes 450 SEL 6.9
1986 Mercedes 420 SL 4.2

On second thoughts it could be the unlock button  2005 Audi A8 W12
1978 Mercedes 450 SEL 6.9
1986 Mercedes 420 SL 4.2

one method clears faults, other is self detruct- upto you to find out
Paul Paul

2014 Range Rover vogue se 4.4sdv8 Loire Blue
1992 Range Rover Vogue LSE 4.2 Ardennes green

If it didn't reset with the ignition switched off and back on you will need to get the car plugged into STAR (MB's equivalent of the IID Tool) to clear the fault

Cheers guys. I'll look into it tomorrow & see what turns up.
Robert. The reason women's minds are cleaner than a mans mind is that women change their minds more often!
When women say fine a mans in deep doodoo as fine has so many meanings.

Find an indie close to the dealership and have him reset it before pushing it onto the dealers forecourt

Try the battery disconnect method we use on the FFRRs. Or get some black duct tape  MY 2010 5.0 SC Galway green and sand interior!!
Have the Faultmate MSV2 Extreme to be tinkering with the settings etc. !!

Mapmate, you were spot on. It was the press open button constantly on the key plipper & hey presto the engine management light went out & hasn't reappeared
Many thanks for the ideas guys,,,Robert. The reason women's minds are cleaner than a mans mind is that women change their minds more often!
When women say fine a mans in deep doodoo as fine has so many meanings.