“Keeping in mind its United States' market in comparison with the A-Class and indeed emulating the R-Class, the aspect of the B-Class was stylized from the back to the nose. Some of the tiny stylistic details of the Baby-Benz (popular name of the A-Class) were removed. In particular, the front of the vehicle was lengthened (although maintaining the Sandwich anti-crash system).”
Sorry, I do not understand your post - but, I promise to reread it in the morning.
Is this a question? Or is it a statement - or perhaps an answer to another question?
I think the design of the B class is possibly the optimum compromise available today. It provides great cabin space with minimum footprint in a practical and affordable package. All models provide excellent safety, reasonable comfort and a suitable balance of performance and economy.
Two four-cylinder engines are available for the new B-Class. Their compact design is in accordance with the sandwich concept, enabling the drive unit to be installed at an oblique angle behind the front axle. This means that in a severe frontal collision, the engine and transmission are able to slide to the rear down the pedal floor panel without damaging the passenger cell.
However, in addition to the unique, angled configuration and the compact dimensions of these the four-cylinder engines for the B-Class, they have plenty to offer in terms of engine technology as well. More output, more torque and more driving pleasure were the development objectives for these engines, and this was achieved together with equally remarkable progress with respect to environmental compatibility, economy and comfort.
Depending on the level of torque, the engines are matted to a five or six-speed manual transmission. The newly developed, continuously variable AUTOTRONIC transmission is also available as an option on all models.
Combination: dynamic driving pleasure with favourable fuel consumption
The key data of the gas engines for the new B-Class at a glance:
The lightweight engine consists of an aluminium crankcase with grey cast iron cylinder liners. The pistons, sump, oil pump, rocker arms, engine mounting, timing case and other engine components are also of aluminium, while the intake manifold, air filter and cylinder head cover are made from plastic.
The compact cylinder head features a swirl duct that creates high turbulence in the fuel/air mixture, ensuring an optimal combustion process. The central location of the spark plugs serves the same purpose. Valve control is via a hollow camshaft of induction-hardened forged steel and low-friction rocker arms. A timing chain with a hydraulic tensioner and rubber-coated sprockets drives the camshaft and a hydraulic system automatically controls valve clearance compensation.
Mercedes engineers have also achieved the high thermal efficiency of the spark-ignition engines with a high compression ratio of 11.0:1. This made it necessary to divide the water jacket into two sections: the lower section has a high speed of flow in order to cool the very hot combustion chamber areas, especially the webs between the intake valves – and therefore make this high compression ratio possible. The upper section cools the engine’s valve control system. In addition, the exhaust valves of the B200 and B200 TURBO are sodium-cooled.
More torque by virtue of a newly developed variable intake manifold
The air supply to the engine is improved considerably by a variable intake manifold with long intake ducts, consisting of three plastic shells and features an electro-pneumatically controlled actuation wheel that opens or closes the ducts according to the load and engine speed. At low engine speeds the intake air flows to the cylinders via four long intake ducts to obtain a high torque yield, this creates pressure waves in the intake ducts. At high engine speeds, the flaps close the intake ducts, so that the air takes a direct path to the combustion chambers via a short intake duct. The engine computer decides whether and when the actuation wheel opens or closes the ducts based on stored characteristic maps, which ensure optimal engine operation.
In the newly developed, turbocharged engine of the B-Class, the intake air flows from the air filter to the turbocharger, which is located in the exhaust manifold to save space. A pneumatically regulated waste-gate valve, dependant on the current engine operating point, controls the flow of exhaust gases required to drive the charger turbine. The compressed intake air flows from the turbocharger through an intercooler, which is linked to the throttle valve adjusting motor. The outstanding torque characteristics of the 190 hp engine confirm the high efficiency of the turbocharger. A special turbine geometry ensures excellent responsiveness even at low engine speeds, making an extremely wide torque plateau available between 1,800 and 4,850 rpm.
What a load of rubbish.
The Mercedes four cylinder engine is so bad they have contracted with BMW to use their excellent unit in the next A and B Class.
We are talking about the gas version here ... I do not believe it's the most advance engine on earth, but I think Merc went for durability, which is fine for me ! Don't they give you a brand new car if you get to 1 000 000 km ?
What a load of rubbish.
The Mercedes four cylinder engine is so bad they have contracted with BMW to use their excellent unit in the next A and B Class.
you sound very bitter and unhappy, if your diesel is that bad sell it and get something you will like. Life is too short to be bitter about a car purchase, unless you just like to whine.
What a load of rubbish.
The Mercedes four cylinder engine is so bad they have contracted with BMW to use their excellent unit in the next A and B Class.
You mean Peugeot/BMW, surely. It's so exciting when we get a troll in here! Woo-hoo!
What a load of rubbish.
The Mercedes four cylinder engine is so bad they have contracted with BMW to use their excellent unit in the next A and B Class.
Hmmm
Maybe we are missing Tristan's point?? Could he not just be joking?? Possible he is sitting laughing at the turmoil he started.
Remember the old "your mama is so fat/ugly she ............" jokes.
Could he not just be joking?? Possible he is sitting laughing at the turmoil he started.
Linear Mode
