Terrible Handling on C300 HELP!
#26
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This is also correct and recalls my 77 BMW 320i which had significant trailing throttle oversteer. As long as the rear of the car was loaded under constant throttle or slight acceleration, it held through turns, but lift the pedal and the rear would break free. I learned this the hard way on an entrance cloverleaf. BMW learned too. I removed the bar and installed slightly stiffer Bilsteins up front, and soon after, BMW had done similarly, as I recall (although I don't remember if they thinned the bar or completely removed it in subsequent years). The result was a car where I could let the rear hang out if I wanted to by feathering the pedal just a bit, but the dramatic surprise factor of facing my point of origin if I had to slow down was gone.
#27
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2011 C300 Sport, 2007 Nissan Titan Crew Cab
OP, are you asian? Just curious, , my fiance has a similar problem. I think it might be due to the fact that she's Vietnamese and doesn't have enough a$$ to keep her planted in the seat. Kidding, just trying to lighten the mood here in this thread.
#28
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[QUOTE=Vai;5032591]. My next car will be a BMW for sure and now there is a new one in the family so I will be able to really make and educated decision. Also, please note that I'm not saying the C-class isn't a great car because it certainly is. Every one has a different idea as to what they are looking for in a car.QUOTE]
Interesting and very informative thread...
While I cannot speak to the anti-sway bars, I can speak from experience regarding the handling of this C350 compared to BMW 3 series cars. My previous 3 cars were 3 series BMW's (I bought a CTS during this time as well due to the marketing intrigue of "the size and performance of a 5 series for the cost of a 3 series, still have this car actually)...Back on track, I owned a 1994 325is that I wish I never sold - amazing car, a 1997 M3 that I made the mistake of buying with an automatic trans and it was less that exhilarating to drive (only 240 hp) and the wheels bent if you addressed a speed bump at more than 5mph, and finally I ordered a new 2004 330ci that was another influence of later buying American (thats where the CTS came in) due to endless issues including replacing the entire steering rack at the tune of $4,600 bucks, the typical water pump issue at 600+ dollars, ignition switch and whatever else they decided to change at the time for another 450+...)
Oh yeah, the handling...I can honestly say the difference is so minimal in the handling of the C350 compared to any of the BMW's (more so with the M3, that was a plus in that car) it is not even worth mentioning - I think this MB handles very well, I drive hard, off ramps and on ramps are a pleasure, windy back roads are a blast, never feel even close to not being in complete control at any speed....No advantage to going to BMW 3 series unless you are looking at getting into a 335 with sport package..just my opinion.
Interesting and very informative thread...
While I cannot speak to the anti-sway bars, I can speak from experience regarding the handling of this C350 compared to BMW 3 series cars. My previous 3 cars were 3 series BMW's (I bought a CTS during this time as well due to the marketing intrigue of "the size and performance of a 5 series for the cost of a 3 series, still have this car actually)...Back on track, I owned a 1994 325is that I wish I never sold - amazing car, a 1997 M3 that I made the mistake of buying with an automatic trans and it was less that exhilarating to drive (only 240 hp) and the wheels bent if you addressed a speed bump at more than 5mph, and finally I ordered a new 2004 330ci that was another influence of later buying American (thats where the CTS came in) due to endless issues including replacing the entire steering rack at the tune of $4,600 bucks, the typical water pump issue at 600+ dollars, ignition switch and whatever else they decided to change at the time for another 450+...)
Oh yeah, the handling...I can honestly say the difference is so minimal in the handling of the C350 compared to any of the BMW's (more so with the M3, that was a plus in that car) it is not even worth mentioning - I think this MB handles very well, I drive hard, off ramps and on ramps are a pleasure, windy back roads are a blast, never feel even close to not being in complete control at any speed....No advantage to going to BMW 3 series unless you are looking at getting into a 335 with sport package..just my opinion.
#30
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#31
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Would have been more appropriate to post I affected its effects by the aforementioned adjustments instead.
Semantics perhaps, but technical accuracy is important to many here, myself included. I regret the error.
From How to Make Your Car Handle:
Chassis people, being more high minded, define a couple as being two equal forces in the same plane acting in opposite directions. The total roll couple acts to rotate the sprung weight around roll axis, and this motion is resisted by the roll stiffness. Notice that the total roll couple can be resisted by either the front suspension, the rear suspension, or a combination of both. Because roll stiffness can be adjusted by means of the anti-roll bars, this weight transfer distribution can be adjusted to suit the needs of the chassis tuner [emphasis added]. It can even be done without changing the roll angle of the car by increasing the roll stiffness at one end of the car and decreasing it by a similar amount at the other. The only thing changed by this adjustment is the weight-transfer distribution.
Not at all. One car had no bars to begin with, and I installed later model oem bars on it, and created a DIY (from instructions) for the Saab forum:
http://www.saabnet.com/sites/900swaybar/
hree other cars were track cars. The first car I just removed the bars when not racing in the summer, as the springs were2X the stock rates. This car had no rear bar, and I designed it and precut the 10ga sheet for bracket parts, welded by a friend. The diameter was 9/16" (.56"). The latest (rx7) I only put them (light upgrade tubular bars from Eibach) on for the summer track season, and switched to oem's for other times to enjoy the beautiful aluminum wishbone type, very independent suspension. The 5th was an old compact wagon that had uncomfortable roll, similar to another case where I installed them on an old Dodge van.
I forgot to mention 2 cases where I removed them. One was a Cobra driven by a race team. It obviously had excessive oversteer, so I offered to disconnect the rear bar and it was a huge improvement. The other was a mountain biking buddy that wanted to take his Civic with me to the road course. I first tested it in a parking lot the day before and found horrific understeer .. not worth the trip like that. I used house wire to tie off his front bar after removing the links. Rolled like crazy but handled like a cat ... he had a blast.
Bars are crude as they effect the opposite side of the car, whether cornering or not. Example, when hitting a brick on the road (dropped from an 18 wheeler you were about to pass on the highway) with one wheel, rather than absorbing it at that wheel, the big bar wants the other wheel to also rise, amking the impact at the primary wheel worse…
http://www.saabnet.com/sites/900swaybar/
hree other cars were track cars. The first car I just removed the bars when not racing in the summer, as the springs were2X the stock rates. This car had no rear bar, and I designed it and precut the 10ga sheet for bracket parts, welded by a friend. The diameter was 9/16" (.56"). The latest (rx7) I only put them (light upgrade tubular bars from Eibach) on for the summer track season, and switched to oem's for other times to enjoy the beautiful aluminum wishbone type, very independent suspension. The 5th was an old compact wagon that had uncomfortable roll, similar to another case where I installed them on an old Dodge van.
I forgot to mention 2 cases where I removed them. One was a Cobra driven by a race team. It obviously had excessive oversteer, so I offered to disconnect the rear bar and it was a huge improvement. The other was a mountain biking buddy that wanted to take his Civic with me to the road course. I first tested it in a parking lot the day before and found horrific understeer .. not worth the trip like that. I used house wire to tie off his front bar after removing the links. Rolled like crazy but handled like a cat ... he had a blast.
Bars are crude as they effect the opposite side of the car, whether cornering or not. Example, when hitting a brick on the road (dropped from an 18 wheeler you were about to pass on the highway) with one wheel, rather than absorbing it at that wheel, the big bar wants the other wheel to also rise, amking the impact at the primary wheel worse…
It was that crude suspension component comment that stuck a nerve. Your W204 still has its OE F&R pair, yes?
Automobile manufacturers have seen fit to install anti-roll bars in their vehicles for many decades. They could have saved millions of dollars by not having done so.
Some automotive engineers go by a slogan made famous by GM’s Charles Kettering, “Parts left out cost nothing and cause no service problems.”
Of course they do reduce articulation and the ‘independence’ of any suspension. To achieve similar road holding capabilities and ‘feel’ from (production/road-going) machines without them requires wheel rates the general public would find most distasteful, resulting in unsold product. In-house and aftermarket tuners typically increase spring rates, anti-roll bar stiffness, damping, and specify reduced deflection bushings and tire aspect ratios from the more pedestrian offerings in an effort to improve handling. No revelation there. If they could do it without anti-roll bars, they would. When a brick on the road or pothole rears its ugly head, all bets are off.
There are many schools of thought to properly exploiting and maximizing vehicle dynamics (and the tires’ adhesion) for a particular purpose. Several actually pan out. To be sure, it’s an interesting applied science and hobby. We likely agree more than you know. Helped a friend get his FWD Honda ‘round more quickly during a local autocross by backing off its front anti-roll bar’s links. Went measurably faster at the now-defunct Riverslide after reducing its effective (transverse leaf & bar) wheel rate in my erstwhile Z51 ‘Vette. Street manners were a damn sight better, too. There’s more than one way to skin a cat.
Next time you’re out this way, I’d enjoy chasing yours during our HPDEs.
#32
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2004 Mazda6, 1993 RX7
It was that crude suspension component comment that stuck a nerve. Your W204 still has its OE F&R pair, yes?
Automobile manufacturers have seen fit to install anti-roll bars in their vehicles for many decades. They could have saved millions of dollars by not having done so..
Automobile manufacturers have seen fit to install anti-roll bars in their vehicles for many decades. They could have saved millions of dollars by not having done so..
....aftermarket tuners typically increase spring rates, anti-roll bar stiffness, damping, and specify reduced deflection bushings and tire aspect ratios from the more pedestrian offerings in an effort to improve handling..
I'm currently going from a 19mm to a 22mm rear bar on another (fwd) car, not to decrease roll, or increase response, but I calculated that it would be just right to neutralize the oem understeer near the limit.
Note that what was suggested in this thread was tossing on a set of sway bars, which prompted me to show the bars in their worst light.
When a brick on the road or pothole rears its ugly head, all bets are off..
Next time you’re out this way, I’d enjoy chasing yours during our HPDEs.
.
#33
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2011 C300 4Matic
Scat01.....You most likely have a different experience with the C350 as it is RWD. My Dad has a C230 Kompressor (RWD) and that thing is a blast to drive. Tight steering and amazing around the ramps. He isn't a big fan of my 4Matic, says the steering is to loose in addition to being numb and sterile. I agree. It's great to get feedback like yours because although my lease isn't up for year I take forever to make such a big decision as I am a perfectionist. If it wasn't for this Northeast weather I would never drive a 4Matic.
#34
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Scat01.....You most likely have a different experience with the C350 as it is RWD. My Dad has a C230 Kompressor (RWD) and that thing is a blast to drive. Tight steering and amazing around the ramps. He isn't a big fan of my 4Matic, says the steering is to loose in addition to being numb and sterile. I agree. It's great to get feedback like yours because although my lease isn't up for year I take forever to make such a big decision as I am a perfectionist. If it wasn't for this Northeast weather I would never drive a 4Matic.
#36
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Scat01.....You most likely have a different experience with the C350 as it is RWD. My Dad has a C230 Kompressor (RWD) and that thing is a blast to drive. Tight steering and amazing around the ramps. He isn't a big fan of my 4Matic, says the steering is to loose in addition to being numb and sterile. I agree. It's great to get feedback like yours because although my lease isn't up for year I take forever to make such a big decision as I am a perfectionist. If it wasn't for this Northeast weather I would never drive a 4Matic.
Your decision, but I would not rule out the RWD C350, it handles just fine during winter conditions, and you can enjoy it big time for the other 9 months..
#37
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... I forgot to mention in the original post that this is my second C-class my last one was a 2009 C300 4Matic Sport. I felt like that car handled better but gave a harder ride. Perhaps it was because that model comes standard with 18" wheels instead of the 17" standard on the 2011 and 2012. ....
Can someone tell me the positives and negatives of a larger wheel? I had thought about buying some new ones and idk what size to get for optimal driving (not showing off).
Can someone tell me the positives and negatives of a larger wheel? I had thought about buying some new ones and idk what size to get for optimal driving (not showing off).
You still need to test drive another C300 and a BMW to see why you are not laterally supported by your seat.
.
Last edited by kevink2; 02-03-2012 at 05:58 PM.
#38
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2010 C300 RWD Auto, 2010 Prius, 2013 Porsche 911 Carrera
Coming from a Porsche 911 and a Cadillac CTS-V I think the MB is superior in handling. And I did race sports cars and formula cars for 18 years. I can take the same corners with the MB as I did with the Porsche at the same speed with the only difference being the seats. The MB seats are not as good at holding you in place as the Porsche or the Cadillac, but are more comfortable on long rides. After three years I am still amazed at how well the MB handles especially for a mid priced sedan.
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2008 C300
Thanks for the great info, and tips!
Hello Folks,
I am a newbie to this BBS, but truly appreciate the insights. Whilst the handling/ride compromise of my 08 C300 leans towards ride, I found the handling fairly acceptable. However, kevink2's suggestion of OEM C350 or C63 rear anti-sway intrigues me. Has anyone checked the diameters? I @ssume the bigger bar would improve the numbers on a skidpad, but is it worth it...?
I am a newbie to this BBS, but truly appreciate the insights. Whilst the handling/ride compromise of my 08 C300 leans towards ride, I found the handling fairly acceptable. However, kevink2's suggestion of OEM C350 or C63 rear anti-sway intrigues me. Has anyone checked the diameters? I @ssume the bigger bar would improve the numbers on a skidpad, but is it worth it...?
Last edited by Shamoon; 12-23-2014 at 01:59 PM. Reason: I wanted to finish my thought
#40
I am coming from an E46 M3 and while my MB C300 does not handle as well, it does an extremely good job considering its weight and added doors. With the right tires, I would feel just as confident taking turns as I did in my M3, partially because of the AWD.
#41
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"I used to charge my staff a quarter every time they said, "I'm like" to precede a prior quotation or feeling they were attempting to communicate instead of the proper, "I said", "I thought", "I felt", "I believed", etc."
Way to go Sportstick! I am so sick of hearing that. Its probably more prevalent in the USA than the UK but believe me its heard enough here for it to send most most people, at least those who had an education, quite delirious.
Sorry for being off-topic.
Way to go Sportstick! I am so sick of hearing that. Its probably more prevalent in the USA than the UK but believe me its heard enough here for it to send most most people, at least those who had an education, quite delirious.
Sorry for being off-topic.