07 Bluetec Problems
This is regarding my mothers 07 e320 Bluetec, the V6. She got one of the first ones, ordered it before hand.
I drive the car on a regular basis and have experienced these problems.
The car has 92k miles, and has an extended warranty until 100k, from mercedes.
When starting the car in the morning it makes an intermittent noise. Its a mix of a rattle and a purr. I know its a diesel, and isn’t supposed to be quite, and i know what they sound like. It makes the noise for 5-10 seconds, and then stops, and keeps doing it. As the nearest dealer is about 5 miles away, the engine is all warmed up when we get there and they say I am imagining things.
The more serious problem.
If slowing down on the highway from speeds, lets say 80 to 40/45 for traffic, when I want to accelerate it wont downshift, and refuses to accelerate. The only way to get it to go is to manually downshift, or come to a complete stop. The mercedes in Northbrook said that unless it did it on their test drive they could not do anything about it.
I took it to my independent shop that services the car on a regular basis, oil changes, filter changes, brakes... They pulled the stored codes, and it had an inlet port shutoff motor code from when the car had 28k miles one it.
I took it to another dealer, and they replaced the intake manifold and a few other things.
They took it on a test drive, and said they could not replicate the issue.
Its been two months and my mother mentioned that the same issue has been happening, as well as my brother. Last night we went out to the city, about 25 miles away from our house.
Coming home on the highway, it was down to one lane for construction. When it opened up I was doing 45, pressed the gas pedal, and nothing happened. It doesn't matter it you apply it lightly, or stomp on it. I tried downshifting manually. The engine matches the revs, but when you hit the gas again, it barely goes, and shakes. I got off the highway, and starting from a stop, it barely went. Absolutely no power. I pulled off at a gas station, turned the car off. When i started it it was fine, But every-time i slowed down or came to a stop it wouldn't accelerate again.
I started it up today, drove it around the block, and it was fine.
BTW, no warning lights or anything.
Also important, is that rite before the car has this acceleration trouble, it bangs through the gears while accelerating. This issue also only happens when I have driven the car for a while, parked it for a few hours, then get back in it.
What seriously bothers me is that my mom does not realize to manually shift it, well that isn’t important as it doesn’t help anymore, and she can get into a serious accident. I was almost hit by 2 semis last night.
Other issues that we have talked to the dealer about, and they claim are normal.
When taking sharp turns, the turbo sometimes becomes extremely loud, as in i can hear it over my loud music with the windows closed.
I already mentioned the weird noise when it idles.
And the very hard shifts sometimes, both up and down.
I had the owner of the independent shop take it for a highway drive with me, been a mercedes tech since 76, and he said its normal for a diesel that when i put the pedal to the floor, it takes a second or two to downshift to get the correct gear, and the takes off, as I have the 7 speed. But it was not upshifting hard. And this is when it is being driven normally, not hard, both by my mother and I. U can sometimes physically feel the gears band though the seats, both with engine warm and cold.
My understanding is that it is normal for the trans to start in second then shift back into first?
My next concern is that the only dealer in the area that treats us like valued customers, they had to change the oil pan twice to get it to stop leaking. They claim it was deformed, yet the tray underneath the car doesn't show a single scratch and is in place. They also consistently lie about how far into the work they are.
Any suggestions what to do, or someone I can contact at mercedes? Because the dealer closest to us treats everyone like garbage unless you pull up in a s65, then the service manager comes to open your door, maybe thats normal.
I apologize if this is confusing, and please ask for clarifications.
I dont have the printout of the work they did with the shut off motors on me as I am away from all the cars records.