Quick Note: Mercedes Brings Nine-Speed Automatic to E-Class
July 22, 2013 11:34 AM
comment(s) - last by
it will gain a combined fuel economy of 53.3 MPG from 51.4 MPG
Mercedes is updating its
with a new nine-speed automatic.
Last weekend, Mercedes-Benz’s German language website configurator revealed that the nine-speed automatic -- known as 9G-Tronic -- will now be standard on the rear-wheel-drive E350 BlueTec. It will replace the seven-speed 7G-Tronic automatic gearbox, which will now be standard equipment on the E220 BlueEfficiency Edition.
While bringing the 9G-Tronic along won't change the E350 BlueTec’s ability to hit 0-62 MPH in 6.6 seconds, it will gain a combined fuel economy [European rating] of 53.3 MPG (from 51.4 MPG with the 7G-Tronic). This is due to a boost in city MPG from 40.9 to 44.1.
The 9G-Tronic also brings reduced average CO2 emissions from 144g/km to 138g/km.
Back in May, Mercedes said it was aiming for
45 MPG highway
on the new 2014 E250 Bluetec 4Matic diesel sedan. Its 2.1-liter, 4-cylinder turbodiesel engine uses twin sequential turbochargers for 195 HP and 369 lb-ft of torque.
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7/23/2013 1:31:40 AM
That is exactly right. I've commented here a dozen times on this, having built transmissions for a good part of my career. Change the fluid, and install an
transmission cooler. If the industry didn't lie to consumers with the rubbish about "filled for life" transmissions and "synthetic fluid that lasts 100k" then the transmission rebuilt business would plummet, cars would run longer, and people wouldn't buy new cars as often.
There is a manufactured lifespan for various components of cars. Engine failures are unacceptable (and can get manufactures in trouble with the EPA when they pollute more as a result) so transmissions were designed to be the weak link of the drivetrain. Consumers are used too and almost
their transmissions to fail these days.
And just when slushbox torque-converter transmissions started becoming reliable in the 80's and 90's, the industry moved to DCT's and CVT's. The icing on the cake is most dealers charge $500+ to flush the exotic fluids in these transmissions so nobody does it.
But if you have a torque converter transmission, changing the fluid is <$100 (you don't even have to completely flush it, and replacing the filter (if there is one) is only necessary every
flush in reality. Some transmissions are cooled through the radiator coolant! Transmission fluid's ideal operating temperature is around 150-160F, coolant is always 180F+, so this is inherently a bad implementation from manufactures BUT ITS CHEAP.
Adding a cooler will extend your fluid life as heat is the obvious cause of fluid breakdown. Vehicles with tow packages always have less consumer complaints in regard to transmission problems because tow packages often bundle a larger transmission cooler. A dual-layer aluminum cooler and a few feet of hose is $100 and can double the life of your fluid. Synthetic fluids last longer, but they
still break down.
What I find annoying is the industry has taken it to a new extreme in making standard (manual) transmissions more unreliable as well. But instead of fluid breaking down (which is very unusual in manual transmissions because they generate very little heat compared to automatics) they designed the internal components to fail. Dual-mass flywheels, the dumbest invention in automotive history (other than maybe wasted spark ignitions) are a completely unnecessary, expensive, heavy, and guaranteed failure point of any manual transmission. The flywheel almost always fails before the clutch friction material.
The obvious ridiculousness of DMF's is their selling point is to reduce NVH and improve shifting quality with smooth clutch engagement. They do this...a little. Over 90% of the clutch engagement is dampened by the springs in the clutch disc, so the ~10% increase in smoothness to replace a $400+ flywheel (traditionally flywheels don't need replacing so there is additional LABOR as well when doing a clutch) is just a scam on customers. DMF's also weigh 2-3 TIMES more than a cromoly or steel flywheel so this is additional drag on the engine, wear on the bearings and a leading cause for crank-walk. If you've had a DMF in a non-diesel Volkswagen or BMW, you know all this too well if your leaking oil from the rear main seal.
Transmission are the weak point of vehicles, they always have been, and they don't have to be. But this is the business.
7/23/2013 9:21:06 AM
I wish it would only cost $100 to change the tranny fluid/filter on these cars lol... Not sure about MB prices, but BMW wants about $500-600 for a change. You ask why?! Even at internet discounted prices, the fluid alone is >$200 shipped and the filter is about $230...
7/23/2013 3:03:20 PM
Go to a transmission shop or lube shop that has a T-tech machine. It uses your transmission pump to pump new fluid in and old fluid out. It is over 95% effective at removing old fluid and requires nothing other than detaching the transmission cooler hose clamps. Most of the time you don't even need to go under the car.
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