Sulfatron

Hi everyone,

I am new to this forum, been following and enjoying it for some time and this is my first post;

I took delivery of my new C63 yesterday and couldn't help but notice a faint ticking noise at idle which I believe is coming from the engine. The noise is only noticeable at idle in a quiet environment (radio off and aircon fan down) and disappears when increasing the rpms.

Has any of you heard this noise with your C63? Is it a normal noise for direct injection engines?

I also notice that when the gearbox goes from 4th to 3rd gear at low speed, the gear change is somehow brutal (as if someone engaged the clutch rapidly in a manual car).

Thanks in advance for your feedback

RDOCA

I haven't heard it on this car but others I have do it and its the injectors tick.
When you get the hard down shift? are you in comfort and coasting?
The clutch can disengage and reengage roughly.

Sulfatron

Well, took the car to the dealership today and they said that the ticking noise is completely normal for this car (something to do with the engine getting rid of gases from the fuel tank).

As for the downshift, yes, this happens when in comfort and coasting. The car is booked for a gearbox software update next week.

RDOCA

One of the car mags. complained about this and several owners said the update fixed it.

Rorie

What update? I am getting the same ticking noise.

RDOCA

The update was for the shifting not ticking. Didn't you have it done if I remember?


Ticking might be injector noise.

MB Dave

Like any DI motor

Solo wing

I think it's the sound of the purge valve ( usually labeled "MOT"). It deals with excessive fumes/vapors in the fuel tank. Mothing to worry about completely normal.

AMG MB

I HAVE SAME THING WITH MY C63S BUT I GUESS ITS NORMAL..

Nashville

the ticking is the direct injection fuel pump that is in the engine bay, completely normal on all 2012 and newer MB's

whitehotC63S

I had this issue. Took it to the dealership. They insulated the fuel pump lines coming from the high pressure pimp and the purge valves, said they were resonating against the body of the car. No more ticking.

SBH-

for the ticking I don't really know about that. BUT for the brutal downshift, I am really disappointed with my gear shifting from 5th to 4th gear and from 4th to 3rd gear. Its really brutal and feels as if there is something wrong with the gear!

Any input guys? Is this normal? FYI the car made 350 kilometers only.

whitehotC63S

350 is hardly anything. My car was real rough changing gears when I first got it but it smoothed out. Plus the transmission learns how you drive so it becomes much nicer. Once the car is around 3000 KM you should have a differential service that is needed. Mine was at 1,875 miles. Make sure you do it! This cleans out all the metal shavings from the diff and it will perform much better as well.

SBH-

So this brutal downshift, which makes it seem like the gear is faulty, would ease out with time? It really worries me the shift from 5th to 4th, throws me front!

whitehotC63S

I mean if it's really that bad I would take it to the dealership. It's under warranty! 😎😎

Rocman8

they are clueless. purge valve on modern benz cars dont "tick" anymore. they are designed differently and the make a slight humm/hiss noise and you cant hear it unless your ear is next to it. the ticking noises you hear is the injectors along with the high pressure fuel pump. after they do the software update make sure they actually adapt the gear shift that you are having the issue with.

AmexWest

An interesting idea. Is there any documentation - anywhere - that the transmission is adaptive learning???

Wleuschen

ScottsC63

untamedd

i get sort of a hissing sound from my exhaust at times.. something to do with the valves im assuming

hsenadhira

Hi Everyone, Thought to join this forum in order to get some help for my w211 / E220 CDI.

I got this car recently and ran for about few thousand kilometers. I didn't get the repair history and I think i made the mistake of not flushing tranny oil. It was shifting fine and smoothly and even drove without skipping a beat. However, yesterday when i was cruising at about 50 and when rpm goes up I heard a tiny grinding noise which was going up with the engine rev. after few hours it refused to shift from 1st gear. Then after about few minutes it refused to move. I switched off the engine and started, then it was fine for a moment. Again same symptoms came up. Now the car is in workshop, they're also trying to troubleshoot as to what has happened.

Would love if you guys can shed some light on this as i'm completely clueless on what happened which i didn't see coming.

raudiace4

It's normal on some direct injection engines, more pronounced on others. It's normal on these cars.

Chevota

I posted to wrong thread and don't see a delete button. sorry...