Is this LIMP mode?.

[E320_CDi]

Guys - I have a w reg Year 2000 E320, on 2 occasions, the car's engine has started to rev at 3000 and it wont go more than 40mph. I stopped the cra, turned the engine off for 2mins, and it was normal again. 2nd time this happened, I was setting of at the lights. Could the ATF needs changing or is ti something else. thanks

 

[The Rock]

Sounds like it.

I had this a few times until I cleaned the MAF sensor. All has been fine since. Loads of posts on here about MAF sensors and cleaning.

Initially I unplugged the wire from the MAF sensor and the car just ran like a non-turbo - slow to pull away but fine at 70mph. That's how I new my problem was MAF sensor related. STAR said it was the EGR valve, which I replaced, but that didn't sort the problem out.

Good Luck,

Rock

 

[jberks]

You'll probably find you don't need to wait 2 mins. Off-On will sort it. If so, then yes - safe/limp mode - probably the MAF but always better to get a diagnostic done.

 

[nickcc101]

Guys - I have a w reg Year 2000 E320, on 2 occasions, the car's engine has started to rev at 3000 and it wont go more than 40mph. I stopped the cra, turned the engine off for 2mins, and it was normal again. 2nd time this happened, I was setting of at the lights. Could the ATF needs changing or is ti something else. thanks

Get the ATF level checked first (cheaper option). Had similar problem when pulling away, lost all drive or would only stay in first gear until i stopped turned off engine and restarted, would then run ok for a few miles. I changed g/box oil and filter and have had no problems since.

 

[television]

There is a cure for this locking up problem, its on the site somewhere, plagues a lot of cars.

 

[E320_CDi]

Hi.. Thanks for the replies. Is it possible for the limp mode / MAF sensor problem to cause a reduction in MPG ??

 

[television]

The MAF sets up the fueling for the correct fuel-air ratio, though the MAF seldom puts the car in the limp home mode, but it can