Why is the C350 not much less efficient than C250 and way better than C300??
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From: NNJ
'11 C350 '13 F150 lariat
for a few mpg most of us want the most HP. The new DI engines are over 300 hp for a 350, the same reason most of us would take a C63 no matter the mpg if it was affordable.....
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From: Pittsburgh, PA
2020 C363 S / 2007 SLK55 / 2016 F150 4x4 / 1998 Cobra Convertible
There is nothing inherently wrong/unreliable about DI. Like any technology, the issue is how it's implemented. No one knows that yet (aside from the MB insiders it appears.)
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2011 C350
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From: Southwest USA
Another round of ICE
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Porsche 991S, Cayenne S, 1972 BMW 3.0CS E9 Coupe
I assume what he meant to ask was whether they have high pressure fuel pumps. The HPFP is an integral part of direct injection systems.
HPFPs are failing on the DI motors with BMW and Porsche (Bosch is the vendor.) I'm sure Daimler has done a lot of testing given the widely known problems with BMW, but some of the speculation has been that failures are connected to the fuel found in the USA. Mercedes diesels have used high pressure fuel systems for a long time but the fuel is totally different. Who knows yet if there will be issues with these new motors.
HPFPs are failing on the DI motors with BMW and Porsche (Bosch is the vendor.) I'm sure Daimler has done a lot of testing given the widely known problems with BMW, but some of the speculation has been that failures are connected to the fuel found in the USA. Mercedes diesels have used high pressure fuel systems for a long time but the fuel is totally different. Who knows yet if there will be issues with these new motors.
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From: Delaware
2004 Mazda6, 1993 RX7
The C350 has a taller final drive, for less rpms at the same speed, for any one gear selected, vs the C300 or C250.
3.07 C250
3.07 C300
2.82 C350 -> 9% taller
I recall the transmission ratios were all the same for the 7 speed atx.
.
3.07 C250
3.07 C300
2.82 C350 -> 9% taller
I recall the transmission ratios were all the same for the 7 speed atx.
.
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From: Delaware
2004 Mazda6, 1993 RX7
.
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Kevin.
The Sales pitch:
7G-TRONIC PLUS 7-speed automatic transmission
The new consumption/efficiency-optimised 7G-TRONIC PLUS automatic transmission includes a DIRECT SELECT lever on the steering column as standard (except the CLS 63 AMG). The seven forward gears of 7G-TRONIC PLUS allow for a larger ratio spread between lowest and highest gears and still ensure smaller intervals from gear to gear. This guarantees optimum engine speed at all times, lower fuel consumption and virtually imperceptible gearshifts.
For quick bursts of speed, multiple downshifting allows the 7G-TRONIC PLUS to skip gears when changing down.
See pdf - The real deal
The Sales pitch:
7G-TRONIC PLUS 7-speed automatic transmission
The new consumption/efficiency-optimised 7G-TRONIC PLUS automatic transmission includes a DIRECT SELECT lever on the steering column as standard (except the CLS 63 AMG). The seven forward gears of 7G-TRONIC PLUS allow for a larger ratio spread between lowest and highest gears and still ensure smaller intervals from gear to gear. This guarantees optimum engine speed at all times, lower fuel consumption and virtually imperceptible gearshifts.
For quick bursts of speed, multiple downshifting allows the 7G-TRONIC PLUS to skip gears when changing down.
See pdf - The real deal
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Oh! & Kevin!!
New 236.15 transmission fluid imminent - In fact already required. I will post Sticky with pdf.
New 236.15 transmission fluid imminent - In fact already required. I will post Sticky with pdf.
