When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I want to be happy with this car. I really do. I've tried too. Its a looker for sure.
here is my car
2015 C300 4M. White exterior Black MB Tex. pano, Burmester. AMG apperance Pkg. 49000 miles I had the wrist pin issue repaired months ago and the engine runs phenomenal. Now have 55000 miles on it - 30 MPG or more at times on the highway at 70 plus mph. Ride is kinda iffy on 18 inch low profile run flats. But hey I'm living with it, here in Northeast PA Stroudsburg area the roads are just atrocious for the most part. Maybe I bought the wrong car for my area and I should just get an old Dodge and be done with caring. Anyway after having my trans serviced at a dealer (by the shop foreman who did my wrist pin repair and 2 front axles and a new AC compressor and all new door LED's with no real problems to speak of) I'm noticing the car shifts harder and sort of grabs some gears (if I'm going too slow for that gear maybe?) like the trans is surprised and upshifts with a wee bit of a lurch. Other times it's fine. The 3 to 2 down shift is gappy if you get on the gas too fast and it sort of bumps you a bit. I've been back to the dealer and they downloaded yet another trans update, I left there and the car shifted so so nice I wanted to cry I was so relieved. It didn't last. Ive tried adaptive reset and it doesn't work for long. Characteristic of the trans from what I see. My 2014 C300 shifted awful. My wifes 2014 GLK 350 is pretty much a dream to drive with a very occasional crappy shift but way more good ones than bad, way more. I'm thinking of bailing on this 4 cyl turbo driveline with the 7 speed. I shouldn't be stressed out over driving it because it I feel like the trans is not programmed correctly for he vehicle. BTW I had a 2015 Chevy 1500 pickup 4WD with a 5.3 and 6 speed. If you want to want to feel a REALLY bad trans thats it. Holy cow I don't know how people are driving those trucks. Anyway I'm going to look at a2013 E350 tomorrow. I think I miss the 6 cylinder. yes I know same trans. But this is really eating me up with this car. Ugh
UPDATE: To anyone having their trans service done I would like to share my experience with the 7 speed auto. I had three different cars done at 2 different dealers and all 3 times they put 5 quarts in and sent me along. The cars ALL shifted less than ideal/ Hit and miss shifts. sometimes fine other times just awful awful shifts and timed wrong. Making you think its you maybe? Your driving style? maybe I'm paying too much attention?? NOPE.... I can only say after adding and correcting the level today on this 15 C300 the car undoubtedly shifts leaps and bounds better. I would NOT settle for the 5 quart service and go along your way. Bad enough your leaving 4 quarts in that are old but having 5 plus new quarts, a new filter and the correct level will make a HUGE difference in how the car shifts and possibly the longevity I would venture to guess. The problem of this ridiculous service design of filling it and letting it drip out until it flows to what level??? Everyone's opinion and eyesight is different. Not as definitive as a stick with hash marks. You wouldn't do your engine oil that way would you?? That is just very poor and leaves a ton of room for error. I can oly say if it feels questionable, it probably is. I don't complain or inquire about things that don't draw my attention to them. My car is back to shifting the way it did before the service. 95 percent clean predictable logical shifts. If I really really try to find a spot where the pedal and the incline and the speed are all just wrong I could probably get a "Bad" shift. Unlike before where they would just parachute in out of nowhere. So THERE Is HOPE.
I had the same issue last year with my 2015 C300. In my case, the dealership determined there was a problem with the crankshaft position sensor. They replaced it, and I haven't experienced the issue since. That's not to say that I think it's a great transmission. Particularly in Comfort mode at slower speeds, it seems to hesitate fairly often, particularly when I need a quick downshift for passing. I keep it in Sport+ 99.5% of the time as a result, even though I know I'm taking a hit on mpg.
I had the same issue last year with my 2015 C300. In my case, the dealership determined there was a problem with the crankshaft position sensor. They replaced it, and I haven't experienced the issue since. That's not to say that I think it's a great transmission. Particularly in Comfort mode at slower speeds, it seems to hesitate fairly often, particularly when I need a quick downshift for passing. I keep it in Sport+ 99.5% of the time as a result, even though I know I'm taking a hit on mpg.
Agreed. It may be a good trans as far as it goes that they are not failing like dropping flies. But I think the fact that so many drivers have their attention drawn to it for some negative reason or another indicates that MB engineers didn't nail it by any means with regard to customer satisfaction. Just because its working doesn't mean that's all we expect of it, especially since some other brands with a far less prestigious history have in fact "nailed it" with regards to balancing longevity and customer satisfaction. I know coupling it with a turbo 4 complicates things in some capacity but I would've thought by now we could get closer right out of the box. Overall I still like the car. Every car has issues of some sort IMO. I do also use Sport here and there but my area roads, the radius of the curves and hills and dips, and of the course the deer here are like linebackers on heroin charging into the road, so I just go slow mostly .
I’ve been experiencing a jerky downshift from fifth to fourth gear. It started a few weeks ago once the temps got down to high 30s/40s. The jolting shift only lasts for a few miles every morning. I have a service appointment to address the issue.
I’ve been experiencing a jerky downshift from fifth to fourth gear. It started a few weeks ago once the temps got down to high 30s/40s. The jolting shift only lasts for a few miles every morning. I have a service appointment to address the issue.
I experience the exact same thing. It occurs going from 3rd up to 4th and from 5th down to 4th. I don't consider it an issue, but please let us know what you find out.
Add me to the list of going from 5th to 4th jolting. Doesn’t seem to be all the time. I didn’t notice it until I got my wrist pins done but that’s also when it started getting cold.
Same issue with the shifting down from 5 to 4. Usually when I first start the car and everything is cold. By the time the car warms up, everything shifts relatively smooth. I brought it in last year and they did a transmission update but it didn’t do anything. Since it’s been cold lately, this problem has come back to light. Keep us updated
I’ve been experiencing a jerky downshift from fifth to fourth gear. It started a few weeks ago once the temps got down to high 30s/40s. The jolting shift only lasts for a few miles every morning. I have a service appointment to address the issue.
Got the car back today. Service Advisor said they did some kind of tranny update. He goes on to say that the rough shift is common with these cars when cold. He told me to let it warm up a couple min in the morning. Blah, Blah, Blah sounds like BS. I’ll take it for a drive tmr morning to see if the update did anything. I doubt it did.
Got the car back today. Service Advisor said they did some kind of tranny update. He goes on to say that the rough shift is common with these cars when cold. He told me to let it warm up a couple min in the morning. Blah, Blah, Blah sounds like BS. I’ll take it for a drive tmr morning to see if the update did anything. I doubt it did.
Already took my car in for this issue once. They did an update and that did not work. Taking it back tomorrow morning, will let you guys know what happens. In another post on here it sounds like it might be the transmission valve body causing these issues. There is also a class action law suit against MB for this issue.
Interesting info here too MB 722.9 7G
I have this issue and I think it's normal. This issue is not exclusive to MBs. Lots of folks over in the VW, Hyundai, and [insert any manufacturer] forums are complaining of similar issues (hard shifting with cold starts). My theory is that the fluid pools down in to the pan after you shut the car off and it need a bit more time when to pull the fluid into the transmission when it's cold.
I have this issue and I think it's normal. This issue is not exclusive to MBs. Lots of folks over in the VW, Hyundai, and [insert any manufacturer] forums are complaining of similar issues (hard shifting with cold starts). My theory is that the fluid pools down in to the pan after you shut the car off and it need a bit more time when to pull the fluid into the transmission when it's cold.
My issue is a hard shift from 5th to 4th and from 3rd to 2nd, and when I say hard shift its as if I was stomping on the brake. I would assume if it was the temperature then all down shifts 7-1 would lag or jerk. My wife's Hyundai and my 15 year old Saab shift more smoothly in the dead of Chicago winter.
Last time I got a loaner from the MB dealer it was in the 20's out and it shifted as smooth as butter. I have experienced laggy UP shifts in an old Saturn when its in the teens out however that went away after a couple mins of driving.
when I say hard shift its as if I was stomping on the brake.
That is way more severe than a hard shift. I don't understand how the transmission can slow down a car like stomping the brakes. I would brake that car at the dealership and demand a loaner. That is simply unacceptable.
Already took my car in for this issue once. They did an update and that did not work. Taking it back tomorrow morning, will let you guys know what happens. In another post on here it sounds like it might be the transmission valve body causing these issues. There is also a class action law suit against MB for this issue.
Interesting info here too MB 722.9 7G
So I just got a call from the dealership. They confirmed as I suspected. Transmission valve body needs to be replaced! will let you all know when I get the car back and if its fixed. Will also upload the work order.
If you guys are experiencing rough shifts too, don't settle with "thats normal for these cars". Its a damn Mercedes, should be smooth as butter.
So I just got a call from the dealership. They confirmed as I suspected. Transmission valve body needs to be replaced! will let you all know when I get the car back and if its fixed. Will also upload the work order.
If you guys are experiencing rough shifts too, don't settle with "thats normal for these cars". Its a damn Mercedes, should be smooth as butter.
Nice work, I’ll have to bring mine back in a month and complain again. I’ll mention something about the valve body. Thanks for the update. I’m still getting the jerky shift from 5-4 but it’s not as bad as it was after “an update” was performed.
Thank's for the post - that's a rock-on-righteous MB Service Dept - a excellent example of following the right process to remedy a verified customer service issue .
It's unfortunate that the "good one's" don't get enough kudo's - but the the "good one's" know they are !
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
