mostafaberg

I heard weird clicking noise (very consistent, like 5 times a second) when the engine is on, popped the hood and found the noise coming from a little thing right next to the ESP module.

When I touch it, I can feel the clicks making it move, like There's a relay inside it ?

It has MOT printed on it, and I have no clue what it is. Is it safe to drive the car?

DarthBudice

It's the regeneration valve, part of the emissions control system.

Safe to drive, easy to replace.

Glyn M Ruck

Purge valve for EECS. They do get noisy when old. Only fix is to replace.

mostafaberg

Ahh thanks a million guys !, I'll take a look into it then

Was a bit worried to drive

samaritrey

Mine has been clicking for over 100,000 miles I have always hoped it would die so I would have a good excuse to replace it.

mostafaberg

I don't know who you are, but i like you !
I'm planning to go for 100k miles too till something starts smoking haha

My test is next year so i'm pretty sure i'll have to change it by hen !

Glyn M Ruck

LOL ~ Yeah they cause no harm. It's just irritating.

mostafaberg

Hey Glyn !

I got a used valve and it arrived today, it looks identical to mine but the gray part at the bottom on my old valve is blue on the new one, everything else is identical

when i tried to plug in the connector, it didn't fit, pinout is the same and everything is the same, but apparently the position of the clip that locks the connector in place is on the side, while my old one is on the centre, when i went back to the seller i noticed it was off a diesel car !

I assumed that it's not compatible with my car, but do you have better knowledge ? online search didn't help me at all...

if it's compatible (diesel/gas engines) then i can just remove the hinge part and use it, if not, i'll ignore the clicking again, kinda got used to it already ,!

neurodave

Maybe someone can correct me if I'm wrong, but isn't there a new redesigned clip that holds it in place that is supposed to kill the noise? Mine is ABSURDLY loud, like obnoxious to the point I can hear it in the cabin of my car.

mostafaberg

I'm not sure if there was an updated version, but looking at the one i got form a newer model, it seems that they changed yeah !, if it's clicking that means it's either time to clean it or replace it, i think it's not really repairable, but spray some cleaner in there and see what happens, i hear mine in the cabin too, so annoying !

Crna Mechka

I wouldn't replace it unless it stops working. Original parts (that were installed when the car was built) will almost always be better than any replacement part.


Mine is loud too in the beginning but the noise fades away after a good 5-10 minutes.


To those of you who can hear the clicking in the cabin - turn the radio up

mostafaberg

Well that's another way to fix it been doing that for a long time so I'm pretty sure it's on the way out! What are the symptoms when it's bad though?

And the part I got is also an original part that was salvaged from another benz so it's very good quality!

Alex85ander

Check engine light came on, these are the error codes.