So after the cruise yesterday my brother drove my car with me in it and it started to hit the rev limiter at 2500, I was pretty shocked, so I told him to turn it off and back on and still same deal. We were only a few blocks from the house so we make it home and I try it with my key, he has the valet set i think since it doesnt open thye glove box. It worked fine for me. Took it to the stealership this morning and they couldnt find anything wrong with it. Help?

 

Sounds like your car was in limp mode ... this happens with Mercedes sometimes... if the engine detects a malfunction it will cut power and limit it's performance to prevent further damage. Could have been a glitch

 

Valet key doesn't allow you to go above certain rpm or speed. Thats all I can think of.

 

your in limp mode been there plenty of times if you was doing any spirited driving or the ecu detected something wrong it throughs it into limpmode reset your ecu by unhooking your battery for bout 15minutes or by the pedal method

 

i just used my reg key and it worked fine again

but yeah there was some "spirited" driving going on hahah

 

Is this true?

 

I can't believe that its taken you months to realize you can't drive your car

 

Yeah ok thats gotta be it

 

hmm thats dumb so if you lose your reg key your fawked and gotta go to the stealership and bent over on a new key

 

I got more than one key, but I doubt it was the key

 

Yeah I heard somewhere that the valet key doesn't let you go over a certain RPM/Speed....

 

best feature ever!!!!!

 

me to the spirited driving prob helped a bit

 

...thats weird, I drive Justin's car all the time with the Valet... and it does just fine, same as when we use his key.

 

i bet this is correct...drive it with his key again.

 

do you have an 2008 with the HREV?

 

I accidentally sat on my keys and broke the top plastic part of the key that attaches to the key ring.. i've been using my valet key for months now never had an issue.

 

you drive a 07 NISMO...they dont think anyone would ever let a valet guy drive it so that feature isnt on yours....lol

Someone find out if the valet key has a limiter...for sure or not ....thats hot. Wonder if I can upgrade my G to have that. Valet guys are allways trying to rev my shizzil "on accident" in DC.

 

ha ha valet guy? I let people run that thing down the drag strip! LOL

 

Sounds like a mass air issue to me. I had a 02 Altima 3.5SE and they would do the same thing. Dirt/oil/other debris can get caught in there and make the car go into limp mode. It might be worth taking a look at. Back in the day we would clean them off with electrical parts cleaner and it seemed to do the trick.