BlackC230Coupe

Well, today I noticed about 3 out of 7 starts with my car that 3 times the second I turn the key I hear a very loud bang, almost like a loud explosion. To me I can best describe it as, you know those stupid things u throw down on the floor on the 4th of July that pop? well the second I turn the key and the engine fires it sounds like someone jumped on a whole box of them. What is this? I only heard it today. But about 3 times, and I started it about maybe 7 times today. If I hear it again I will I will have to give the dealer a call.

BlackC230Coupe

I would also like ot add that the car runs great though, and does not feel weird at all when driving.

akbro93704

don't know what that could be. Once in a while when I start my dad's ML55, right after the engine has turned over, and while its revving quickly to about 1500 RPM(like every car), there's a loud clicking sound that clicks quickly 4 or 5 times...but you say yours sounds like an explosion, so it must be something totally different. Keep us posted on what the dealer says!!

aznboi320

did that ever happen to your coupe?

BlackC230Coupe

Never....

ronnie0738

it happened once to my c32 when i got some cheap gasoline.

LorinserCClass

yeah it could be that man. Did you try a new gasoline station out or something?

BlackC230Coupe

I actually have not put any gas in yet. This is how it came from the dealer. Its gas from california, so is this common there? lol. I actually drove it hard for 227 miles and i got about a 1/4 left. Not to bad for a V8.

But u guys really think it can be from the gas? why did i only hear it yesturday? and why is it only on some starts?

3199cc

check your engine mounts. even if the mount is not broken its possible that the bolt is loose or fell out and the engine mount bangs against the chasis when started. I know i had a similar problem

Nickerz

I would take it to the dealer and see if you can repeat the noise while they are present. I wouldn't take any chances on it going away and then it being some bigger problem down the line. Take it in and let them look it over.

Nick

FIXEDupW209

hey nickerz i know you want to use a smiley face i know you do

FIXEDupW209

yeah bro just take it in, no need in risking it.

s4iscool

if you have a digicam with video capabilities, carry with you when you start the car...record it, because most likely the dealer will just blow you off and say they couldnt duplicate the problem...show them the video and most dealers will accept that. Sucks on such a nice new car

ronnie0738

I had to get some cheap gas cuz I was running dry...after that, I had no problems.

Nickerz

Okay...ya got me, here...



There's two! Those damn smiley faces are growing on me too!

I've seen really cool ones on some other sites, I say MBWorld needs to get some more!

Nick
PS...just this once!

oggle

I think James got to your car afterall...

BlackC230Coupe

Well, today i called a friend of mine. He is a tech a my local MB dealer. I explained the problem and he said he really cant tell anything without checking it out. He said it can be from the gas. So he told me to go fill it up with some premium gas incase the dealer did not use any at first. So now i have a full tank (shell 93 octane) I did not hear the noise yet, but then again i did not hear it other times besides yesturday also. So his advice after the gas was to see if i hear it again, and if i hear it one more time then something will need to be checked, and i at that time i will bring it in right away.



I will keep you guys updated.

AndyAMG

Its probably the gas. My friend had that same problem.

No worries. Keep us updated-

g luck

BlackC230Coupe

The only reason why i think it might not be the gas is because i did not hear it any of the other days...

FrankW

I had once that when I turn the key, the computer fails to start the car.

nealpatel

BlackC230Coupe-
I am a proud new owner of a C55 as well, and I haven't heard a noise like that.

One question I have for you, is how hard did you actually drive your car to get 220+ miles on it, and still have a 1/4 tank left?

I have had mine for a little over a month, and I haven't ever gotten 220 miles to a tank yet! I wanna make sure that there is not something wrong with my ride! I get tired of going to the gas station....

Thanks!

BlackC230Coupe

Funny you brought this thread back, i was just about to make a new one since i just brought it to the dealer today. Not only after i heard that loud noise, i heard a loud clicking sound on some starts and i also noticed a loss in power. I brought it to the dealer last week, They replcaced the battery since they found nothing. I brought it back today and they made me go on a test drive with a service tech manager? whatever his position was. The guy looked about 95 years old and was driving with his hands at 10 and 2 and was really slow! As he was driving i was explaing the problem to him. He then said hmmm, maybe its the supercharger clutch? i looked over to him at that time am said, ummm, sir, its not supercharged! he was shocked and thought that they were! which was not to comforting knowing the people that work there are so stupid, and they are suppose to fix my car! He then got on the highway and floors it, he right away said, this things got power! "i think your just getting used to it". I knew for a fact it was alot quciker when i first got it. He has never even drove one before to compare it to. After that i thought there was no hope in fixing it, and that it would be a car with problems forvever! We then got back to the dealer and i left the car there. About 4 hours later my service advisor called me and said, they did not find anything last time since there computers did not have the new flash for there computers to reconize this ECU. They used a new computer with the "flash" and they found multiple faults in the ECU. They said the name of the ECU only i forgot it, so i am gonna call tomorrow to find out exactly what it was called. But they said it wont be ready till atleast friday since they need to order a new ECU from germany. I am very mad i dont have the car, but i am happy at the same time that they actually found a problem and hopefully it will be fixed for good.

btw, seems like there are 2 Neal's here now with a C55.

nealpatel

Glad that they were at least able to find the problems in your car. I might take mine by the dealership and tell them that I don't get good gas mileage, and see what their "computers" can find.

Zeppelin

They could probably keep yours until Friday as well. They can never pass up good test drives, one of the tech's will probably even drive it home at night to give it a good check-up

waldis

maybe u should get a dyno test for your c55 to see if the car is really losing power because sometimes it is a mental thing, where people "feel and think" their cars are losing power. just my .02.

also, what is the name of your dealer?

let us know how things worked out for your! I would be interested to know what are the ECU faults that the dealer diagnosed.

Good Luck!