Limp Mode Problem

[rf065]

Today I travelled down the dual c/way with cruise set at 65mph.
I braked to turn off the dual c/way & took a side road to the left, when I re-applied the throttle there was no power, the car had gone into limp mode.

I stopped and restarted the car & it was no longer in limp mode, but for the next few miles the gearchange was very erratic. Everytime I applied the throttle there was a delay as the auto box seemed to be changeing down a gear before it would accelerate.

I know I'll need the fault codes read, but could turning off a dual c/way reasonably fast trigger something to put it into limp mode? Low auto box oil level or something? The car was seviced 2 weeks ago & had the auto box oil & filter changed by MB at the same time, coincidence?

Russ

 

[lynall]

When mine was low on oil in the box it dropped out of gear coming off a roundabout driving pretty fast, pulled off road, ign off and on again was ok on restart posted on here told to check oil which i did and topped up and has been changed a couple of times since and has been fine.

Doesnt sound like low oil in your case especially if light is still lit.

Once after doing some engine work i drove to work and wondered why engine lamp was on stopped halfway and noticed i had left the maf unplugged, plugged it back in light stayed on but coming home later light was out and again has been fine since.

Maybe worth a look around the engine to make sure nothing stupid has been done!



Lynall

 

[rf065]

Doesnt sound like low oil in your case especially if light is still lit.

Maybe worth a look around the engine to make sure nothing stupid has been done!


Lynall

No warning lights before or after in my case, just into limp mode. Strange.

Russ

 

[merc-c]

Sounds like the maf to me.
symptoms seem the same as on my old car W203 220 cdi
when the maf was faulty.
new maf around £70 from stealers

 

[Druk]

Since this happened just after braking I wonder if the brake light switch has something to do with it. Apparently, it is part of the circuit involved.