guynamedsean

Hey all, I picked up a new 2015 507 today. Driving through the uneven roads in my neiborhood, the rattling noises are driving me insane. I've spent the last 2 hours removing everything from the car, folding the rear seats down and up, etc. I can't seem to figure out what's making the noise.

What are the common areas to look at.

CarHopper

What kind of rattle? Metallic? Squeaky? Picked up today... Drive it back and have someone take a look.

guynamedsean

Like every expansion joint and bump echos through the entire car. Is this normal on the 507?

CarHopper

It is a rigid sports car so... if you're driving on rough roads you're going to hear it.

guynamedsean

Yeah I understand. I always buy the most hardcore car possible. My girlfriends hate it. I guess its the secondary noises that seem to be all over the car when I drive over bumpy roads that's driving me insane. Seems like it comes from seats, console, pano roof and rear deck.

On smooth roads I hear nothing. If I drive fast, the amazing engine drowns it out... Lol.

Do I just need to get used to this?

CarHopper

Depends. Could be the pano roof squeak. You could always take it to the dealer and say there is excessive rattle and such going on. But without being able to narrow anything down your guess is as good as anyones at this point.

guynamedsean

Yeah. I just hate seeing techs get all excited about driving the **** out my car. Maybe I'll do this when I'm due for the diff oil change.

On a side note I bought a 507 with way too much equipment because it was the only one with a LSD.

guynamedsean

If the pano roof is the problem will it stop when I open the roof? If so, that would at least help identify it.

CarHopper

No, just a thing with the pano.

Don't worry about techs driving your car. Supposed to be driven hard anyway. I know that's hard to stomach but it really isn't bad.

BTW -- most common noise complain is a squeak coming from behind the center dash. But you said a rattle so idk

SaphGreyC63

I would either let them drive it or take them for a drive.

Also, I used to sweat the techs or a valet taking my car. As long as they dont make the interior dirty or scratch/dent/ruin the exterior in any way, they can drive it as hard as they want, because quite frankly, I don't think they will push it any harder than I do or already have.

On a side note, my car is at the dealer now and the dealer couldn't reproduce the sound that was happening. I told them, trust me, its very reproduceable and noticeable. Best way I can describe it is like the car is clearing its throat but a car would have metal "dice" or "snot" that it's clearing so it sounds like metal rattling out of the exhaust. Only thing is it happens in 2nd and 3rd gear at exactly 4k RPM when you are stepping on it, not babying it. (not sure about others as 1st comes too fast and hard to hear, and i don't normally run the car in 4th-7th). I told them you are probably just not pushing it hard enough. That turned out to be the case, because I went in, told the tech to hop in, and instantly made the noise happen and he agreed it was easily heard and noticeable.

Anyway long story short, they thought it was an exhaust problem so they replaced my resonator, no go, replaced the secondary cats, no go. Now they might think it's an engine problem....hope its not, I'll find out next week, but either way everything is covered by warranty.

guynamedsean

Well I just went and drove the car all over the place on different type roads and the highway.

First off, holy **** that engine is just crazy good. Trying to drive this car slow is amusing. I had a few occasions where I'm leaving a light as slow as I can without making the car all jerky. There is an idiot trying to race me and we stay neck and neck until I reach a few miles over speed limit and stop accelerating. The idiot thinks he ran with me. What's wrong with people?

Anyway, second off, the suspension on the 507 is stiff as ****. Not complaining, but i just realized it's been a long time since I owned a car this stiff. Roads that felt relatively smooth in other cars feel like cobblestone in the 507. I have never driven a non 507 c63 but man the 507 is stiff. I like it, but bad roads are punishing compared to other cars.
So here is what I figured out. On smooth roads there is no noise at all. On the highway, no noise either. On rough roads there is definitely pano noise. On really really really rough roads the suspension and dash board chime in and the noises are pretty substantial.
Also the roads that I drive on suck pretty bad.
Then I discovered that the car has a pretty good stereo and it completely drowns out all the offensive noises even at moderate volume.

So I think I definitely have some pano noise on roads that are anything but smooth. The other stuff I think is only on really bad roads.

I guess my question is:
Should I have it looked at for pano noise or is that just normal on rough roads?

FR507

Pano roof rattle seems to be the norm. For me it was that, center speedo plastic dial screen and driver window controls hitting each other and rattling on bumpy roads.

guynamedsean

How much of that was sorted out and what did you have to learn to live with?
I want to address what should be addressed, but enjoy the car, rather than trying to turn it into something it isn't.

CarHopper

You can probably soften the car up a bit (and lower it) with h&r springs and not lose any noticeable performance. Might even hold the road even better.

guynamedsean

The car also came with Conti tires. Would switching to PSS soften it up? I did that switch on my cla45 and it was soooo much softer afterward.

FR507

Actually I just learned to live with it but might bring it up at the next service. Pana roof rattles only with the shade open and the sunroof closed. All other combinations and it doesnt rattle yet (for now). The window switches only rattle on bad roads and occasionally at high speeds and the dash rattle comes and goes when it pleases. I came from a RenaultSport so I've developed a high tolerance for rattles and firm rides.

guynamedsean

Dont flame me for this question. Trying to find out on my own but see conflicting info. Do the c, s, s+ modes effect suspension stiffness at all?

CarHopper

Nope

-ian

Just remove your secondary cats and fit some long tube headers and an IPE exhaust.......and voila your squeeks will disappear....... Or if that's too much for your budget just turn your stereo up

guynamedsean

ok. Great news! I noticed this car recommends very high tire pressure. Then I noticed I was 5-8 lbs low at all corners. I set it to the factory specs and my rattles are much much much improved. Now that the distraction is gone I'm enjoying the car much more.

malfius

What PSI did you set it to??
im having the same problems on my coupe..
sometimes i feels like my pano is about to crack

guynamedsean

Do whatever is listed in your drivers door jamb. Those are cold temps, so set to that temp when the tires are completely cold.

For me there was a huge improvement on most roads. On really bad roads it's still very noisy but that's to be expected when the car is bouncing you all over the place.

Ruff507

When its time to replace the conti's I suggest PSS they helped a ton with sound as well as handling in wet and dry conditions.
You also can go a bit wider in front and back with zero rubbing.

Congrats on your 507 enjoy!!!!

guynamedsean

Thanks for confirming my intuition. My plan was to go to PSS. My CLA45 rode rough and had contis and when I switched to PSS it made the car ride like butter.

guynamedsean

This car seems like it will eat a set of PSS in 7k miles though. I'll still do it though.