MezZzo300

Just bought a used 2015 C250. Great car but something I notice while test driving was a shaky/bumpy feel coming from the front of the car only when I'm cruising in the 15-20mph range (lwhen getting out of the parking lot when steering to turn left). I plan on taking it to get looked at but anyone have any idea what this might be? Basically feels like I'm driving over small rocks at the speed. All other speeds are fine and its great on the highway. Im confused as to what could be causing this.

Thanks!

ManiacGT

Damaged suspension, improperly balanced front wheels...

Shadwell

Check wheel but torque......

MASSC450

If the shaky/bumpy feeling you're experiencing is rhythmic, it might be a tire.

I've notice on cold mornings, my 19" stock run-flats flat spot, and it takes a little bit of driving before it corrects.

MezZzo300

the problem happens when the weather is cold or raining only happens when i first start the car and move it out of the parking ... it only happend like 3 times in the last 2 months
suspension is good there were no problems in the car

ManiacGT

I'd suggest then if only in parking lot that it's simply wheel angle and the tyres skipping. Maybe check wheel alignment.

Mike5215

Are you turned hard against the left steering lock when it happens?

MezZzo300

yes i turn the steering wheel the whole way to the left and then it starts to shake from the front

Mike5215

Sounds like a problem in the steering rack. Is it 4Matic or RWD?

kleinebin

Yes, and I'm going to admit my stupidity: You probably just hit the on/off button next to the trackpad. I discovered this the hard way after getting my car washed I couldn't get the screen working. Did the eject trick and the logo would come up but no media. I called the dealership who told me to hit the on button and voila!

kleinebin

Had my ride for 2 months, had to replace one of the tyres after one month. Had no idea how crap the Contisport Contact run flats are until I did some digging. Seeing my pride and joy on a tow truck after a few weeks and being carless for 48 hours was upsetting and inconvenient. The next time a tyre goes I'm changing them all to non run flats.

Other issues include the keyless boot open/close hardly ever responding and it taking at least two presses of the red buttons to close.

Also noticed the Bluetooth disconnects ever now and then reconnects then disconnects. I use Bluetooth for phone but USB for music from my iPhone. Sometimes the car doesn't recognise the phone via the cable, stops allowing me to change tracks via the car and I have to physically disconnect the cable.

Finally, I notice Active Lane Keeping Assist is nowhere near as responsive as our E400 cabrio. I have tested it with broken and unbroken lines without steering and often the car does not report at all.

MezZzo300

its RWD

MezZzo300

i noticed lately that when using the selfsteering the steering wheel makes noise and feels like the car is thick

Luton Driver

Sign of the times when MB not only stopped proving a spare wheel, but the provision even to carry one.

Makes you wonder about their thinking when they provide a square deep recess for a storage crate when it could have been round for a tyre.

kleinebin

TBH, as soon as it happens again I'm going to replace them all to non run flats and buy a space saver and keep it in the garage.

MezZzo300

???????

MASSC450

Let alone the profit Mercedes makes by not supplying a spare tire/jack/lug wrench, I bet they also make a pretty penny from the run-flat tire manufacturer as well since the cost of run-flats is so much higher than a conventional tire.

Mike5215

Yeah, I swapped mine out before the first payment was due. First set were BFG Comp TA. Great riding tire but god-awful to look at. Just ordered a set of Michelin PSS, which I've discovered has been discontinued in the 18" front size (225/45/18). TireRack still had them.

Meanwhile I'll make anyone who's interested in the BFG set with about 400 miles on them a great deal. Be warned, they're not pretty.


Ride quality and quietness are a 9.5 out of 10 though and they have a 22,500 tread life warranty.

WhoIsThat

I wonder if there are data points showing MB is actually fixing teething problems after the first year of production.

mcbc220

Consumer Reports comes out in October, and I suspect that will be the strongest indication. If it's not much improved, then they're not teething issues as much as design or manufacturing flaws. I think some of the key problems--suspension, bleeding seats, squealing brakes--have been rectified. Seems like some build quality issues (rattles) remain. I think the comparative silence this year on the forum, relative to last year, regarding serious issues is a good indication.

Personally, I think Mercedes always needs to be more reliable than BMW as part of its value proposition. When I was growing up, the trade off between the two was that you would give up some driving dynamics for higher quality, both in terms of a smooth ride and in frequency/likelihood of problems. I'm willing to deal with more repairs for a sporty car than for one that promises to be "the best".

Shadwell

My percetion; While the volume of issues raised on the forum may be dropping off, its fair to say some damage has been done to the perception of this model.... certainly in the US market, numerous folks have walked away from MB due to their issues.. (rightly so in some instances)...


I would now happily have an alternate brand and model following the issues i have endured to date.... that wasn't the case after the previous MB over 5 yrs..


The fact I have sorted the vast majority of issues to date (manu minor issues still outstanding / continue to develop), after alot of inconvienience, and the hammering you get on near new residuals, are the only real reasons for staying with the car. ie my brand perception has chnaged markedly..
MB are now IMO a high tech, innovative, high price, moderate quality product....


Reality is the tech and innovation are very rapidily deminished as other brands follow suit... at a lower cost and higher quality.. makes the purchasing decision more open for sure...

mcbc220

Fair enough, although damage to perception of the model isn't the same thing as some of the issues themselves having been sorted in year two (if, in fact, they have).

What minor issues have continued to develop? Are they technological or mechanical or both?

Shadwell

Both;


Updates provided by MB for instance the TCU software updates introduced a very rough shift from 2nd to 3rd up or down, wasn't there at all previously..


Continued and developing creaks have been common... or the dealers are unable to effectively remedy.. eg applying silicon grease to window moudlings when door cards are creaking..


Previously non groaning brakes staring to groan at low speed..


every month to date (9 months thus far), there has been something either continued, not corrected or new...


and whilst my particular delar has been very accomadating, the situation still stands..


I'm not bitter or overly frustrated by it all.. but what was a handsome and high tech and somewhat apsirational product, has now become a bit meh..... which is a shame..


Anyhow I shall change at 3 years old.. and MB may or may not be in the frame at tthat point...

mcbc220

Sorry to hear that. I would hope for the sake of the model generally that those things are more a function of that particular car being an early build. It will be interesting to see by this fall/winter, when more W205s should have been in use for 10-20k miles, whether many people's cars keep on developing faults, or whether the teething issues, once fixed, settle that for a while.

bobhbenz

Has anyone experience this, it does not seem like a balance issue it more like a vibration that comes and goes at two to three second intervals, very annoying. I have those hard riding run flat conti tires, that make a terrible sound when turning...what's up MB