Engine Vibration in Drive
Thread Starter
Junior Member
Joined: Oct 2016
Posts: 25
Likes: 0
2017
Engine Vibration in Drive
Having some weird vibration in a GLC300 with about 1500 miles on it.
First, at idle, when the engine is on, there is an slight vibration I can feel in the seat (both driver and passenger), but only after the engine has warmed up. It's enough to be noticeable and annoying. It goes away when the vehicle is in neutral or park.
Second, about 2 seconds after the engine turns on (following it turning off with the auto start/stop), there's a shudder that can also be felt in the seats and a bit in the steering wheel.
Have raised this with the dealer on three separate trips for other problems (brakes screeching). Each time when I've had a loaner (GLK350 x1 and C300 x2), I don't feel anything like this at all.
The dealer tells me they've checked the engine performance data and don't see anything, and also that they've done multiple road tests and a "quality control check" and haven't found anything outside of normal parameters. He said that any perhaps it's because this is a direct injection 4 cylinder, which is good on gas, but noisy. Basically, my service advisor has gotten a little dismissive and thinks I'm just complaining about how a gasoline powered engine works.
Am I expecting too much here, or should I just take this to another dealer? Seems to me like a C300 loaner with 20,000 miles shouldn't be driving smoother than my new GLC300...
First, at idle, when the engine is on, there is an slight vibration I can feel in the seat (both driver and passenger), but only after the engine has warmed up. It's enough to be noticeable and annoying. It goes away when the vehicle is in neutral or park.
Second, about 2 seconds after the engine turns on (following it turning off with the auto start/stop), there's a shudder that can also be felt in the seats and a bit in the steering wheel.
Have raised this with the dealer on three separate trips for other problems (brakes screeching). Each time when I've had a loaner (GLK350 x1 and C300 x2), I don't feel anything like this at all.
The dealer tells me they've checked the engine performance data and don't see anything, and also that they've done multiple road tests and a "quality control check" and haven't found anything outside of normal parameters. He said that any perhaps it's because this is a direct injection 4 cylinder, which is good on gas, but noisy. Basically, my service advisor has gotten a little dismissive and thinks I'm just complaining about how a gasoline powered engine works.
Am I expecting too much here, or should I just take this to another dealer? Seems to me like a C300 loaner with 20,000 miles shouldn't be driving smoother than my new GLC300...
Super Member
Joined: Dec 2015
Posts: 812
Likes: 86
From: Springboro, OH
16 GLC 19 Volvo XC40 06Corvette Z06
I would put a few more miles on it.
The start/stop function on my GLC has improved significantly with about 11,000 miles logged.
Initially my complaint was very similar to Redcat's. Currently however, upon restart, the once excessive vibration has almost completely disappeared.
My gut feel is we're dealing with a direct injection four cylinder engine and four bangers are inherently more prone to vibration.
The start/stop function on my GLC has improved significantly with about 11,000 miles logged.
Initially my complaint was very similar to Redcat's. Currently however, upon restart, the once excessive vibration has almost completely disappeared.
My gut feel is we're dealing with a direct injection four cylinder engine and four bangers are inherently more prone to vibration.
Last edited by larrypmyers; Nov 30, 2016 at 07:48 PM.
Thread Starter
Junior Member
Joined: Oct 2016
Posts: 25
Likes: 0
2017
I would put a few more miles on it.
The start/stop function on my GLC has improved significantly with about 11,000 miles logged.
Initially my complaint was very similar to Redcat's. Currently, upon restart, the once excessive vibration has almost completely disappeared.
The start/stop function on my GLC has improved significantly with about 11,000 miles logged.
Initially my complaint was very similar to Redcat's. Currently, upon restart, the once excessive vibration has almost completely disappeared.
Now, to fix the wiper chatter and it will be a perfect vehicle rain or shine!
Super Member
Joined: Dec 2015
Posts: 812
Likes: 86
From: Springboro, OH
16 GLC 19 Volvo XC40 06Corvette Z06
I am very pleased with my GLC. If one needs assurance, ride in the competitors cuv/suv. Doing so will convince you you've chosen the right vehicle. Its not perfect but none are.
And that's saying something as I'm a hard core American car guy.
I bought the M-B because my wife wanted it. As they say, "happy wife, happy life."
And that's saying something as I'm a hard core American car guy.
I bought the M-B because my wife wanted it. As they say, "happy wife, happy life."
Thread Starter
Junior Member
Joined: Oct 2016
Posts: 25
Likes: 0
2017
Just wanted to close the loop here. I took the GLC in once more for something else (chattering wipers). My service adviser felt the vibration with me and it seemed out of place to him, but he said he had 2 different techs drive it, and they said it's within tolerance.
So, perhaps the ride will improve over time, but I'm starting to wonder if I'm just spoiled by the silky smooth idle on my old Lexus RX? Time will tell!
So, perhaps the ride will improve over time, but I'm starting to wonder if I'm just spoiled by the silky smooth idle on my old Lexus RX? Time will tell!
Junior Member
Joined: Sep 2016
Posts: 53
Likes: 4
From: Coquitlam, BC, Canada
2017 GLC 300 4MATIC (formerly: 2010 Lexus RX 350 & 2013 Mercedes-Benz B250)
Newbie
Joined: Jan 2017
Posts: 1
Likes: 0
GLC 300 4Matic Sport
Anyone find a solution?
Not to revive an old thread, but wondering if anyone found a solution to this problem. My GLC has about 6,000 miles on it and suffers from this very same issue. Slight vibration under idle when in drive and reverse, but goes away in park. Especially noticeable in the seats. Annoys the S#it out of me... Took the car to the dealer twice, both times they claim there is no code so there is no problem. The engine becomes smooth as silk if you give it 50~100 more RPM so I have asked the dealer if an idle increase adjustment could be made, but they claim absolutely impossible due to their lack of access to the engine management program.
I understand that the car is a DI 4-cylinder, but it seems excessive for this level of car. I have driven other cars with DI 4 bangers (BMW X3, 2.0T audis, etc.) without this problem, and even Hyundai's 2.0T DI 4 is smooth at idle.
I was beginning to think that maybe this was a poorly designed engine, but I had a 2017 E300 4Matic loaner for almost 2 months (received it with about 3000 Miles on it) with the same power train and it was smooth, no vibration at all. So i figure WTF... it's probably a handful of these cars with this problem. I got especially lucky with a GLC with a boat load of fun issues, some fixed, some not.
I understand that the car is a DI 4-cylinder, but it seems excessive for this level of car. I have driven other cars with DI 4 bangers (BMW X3, 2.0T audis, etc.) without this problem, and even Hyundai's 2.0T DI 4 is smooth at idle.
I was beginning to think that maybe this was a poorly designed engine, but I had a 2017 E300 4Matic loaner for almost 2 months (received it with about 3000 Miles on it) with the same power train and it was smooth, no vibration at all. So i figure WTF... it's probably a handful of these cars with this problem. I got especially lucky with a GLC with a boat load of fun issues, some fixed, some not.
Last edited by BM2MB; Jan 1, 2017 at 10:59 PM.
