Took delivery of a 2007 E320 Bluetec last October. Within 150 miles the transmission exhibited shift abnormalities. Despite having taken the vehicle in for service three separate times, the transmission failed by 2,800 miles. The dealer bought back the car.

Anyone else having problems with this MY's transmission?

I do not own a 7G-Tronic equipped vehicle, but most auto magazines comment that early versions continuously hunt/roughly shift.

I have heard of some issues with transmission failures of new 7G-tronics. Was there anything else wrong with the car? Just curious as to why the dealer bought back the car instead of replacing the transmission? Did they give you another E320?

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Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record

The 722.9 transmission has had a variety of problems since day one. The majority of them can be fixed with software, in fact, there's a Service Campaign going on right now to update all affected vehicles. Some need to have "improved" internal parts installed. Others require replacement of the valve body(which includes the control unit). When all else fails, a small handful of vehicles will need new transmissions.

On the bright side, unlike 722.6, the 722.9 transmission doesn't have any problems with leaks.

Give them a few years, they havn't aged properly yet...all Mercedes leak.

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2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200

Wouldn't it be better to put more work in a sturdy computer-controlled CVT? These have been going up in power handling capabilites recently.

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86 560SL
With homebrew first gear start!
85 380SL
Daily Driver Project

http://juliepalooza.8m.com/sl/mercedes.htm

Sounds like he excersized his rights under the lemon law to get his money back (after 3 tries to repair you're entitled to have them buy it back minus a mileage allowance)

...more power to him...no excuse for a $50K+ car to be in the shop 3 times and need a new tranny after less than 3K miles.

I think it is asking a lot of a buyer to accept a car that needs a transmission replacement done that early on in its life...I know I wouldn't want the car knowing it had been done if I had the choice to return it and get my money back.

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz

BMW recently announced a 7 speed or 8 speed, I forget, stating that they were not going to left behind, left behind in what I don't know. It seems to me these people are certifiably nuts. Mercedes hadn't even mastered the five speed yet really. I love it when they say you can shift manually if you want - through 7 or 8 gears, sounds sort of all consuming to me.

What's the point of having so many forward gears on something like a passenger car anyhow? It seems like the transmission would be constantly shifting from one gear to another.

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" We have nothing to fear but the main stream media itself . . . ."- Adapted from Franklin D Roosevelt for the 21st century

OBK #55

1998 Lincoln Continental - Sold
Max 1984 300TD 285,000 miles - Sold
The Dee8gonator 1987 560SEC 196,000 miles - Sold
Orgasmatron - 2006 CLS500 90,000 miles
2002 C320 Wagon 122,000 miles
2016 AMG GTS 12,000 miles

eh...fuel mileage or whatever.

my R350 has a semi harsh downshift 3-2 or 2-1 from time to time. Its not the clip coming off but more of a needed software update for the module. Its not bothering me to the point where it needs fixing yet.

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1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350

Well this is exactly what I thought, something is amiss with the new 7 speed tranny, I just test-drove a new one, and it shifted terribly, so bad that I am not going to think of one till they figure out what is going on.

Personally a 7 speed tranny has no place in a diesel, give me a 3,4 or my 5 speed tranny anyday, with this huge torque available, you wonder why benz would not figure this out on there own.

Have ya'll checked for vacuum leaks?

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Jim

The 722.9 isn't exactly new, in fact, it's been around since 2004. For some reason, the early ones didn't have anywhere near the number of problems they've had in the last two years.

i have noticed on the newer trannys they have software that lets off the gas, shifts the gear and reapplys the gas just like i would with a stick. (as described above, too.)

the old way was to just shift and the clutches had to slip a bit. the new way there is less wear and tear (theoretically) on everything and i bet they discovered they could fit a lot smaller gears and clutches....so therefore with all that extra room and weight to burn they just decided to add more gears.

more gears means better acceleration and better economy....best of both worlds as long as it doesn't increase weight or wear and tear.

my $.02.

i never read all this anywhere but just thought about it.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

I'm not sure if real life situation reflects this. Shifting takes time, especially on an auto box. I think having too many gears and tranny constantly being confused, as to which gear to engage would actually hurt the accel? Why not 'ride' out the power band, instead of having more gears that waste time shifting.. Repair or rebuild would be a pain in the neck as well.