jopsis_c63s

Hi,


I want to start a discussion about this video.

How many people have this problem on their cars?
How many kilometers/milleage?

Jimmy_c63s

It's a good video you've posted.

The only issue I've had iin that video are both active engine mounts cracked and I've had the car for over 7 years but I'm preparing I guess. Mine is a dinosaur old prefacelift coupe.
However, I've had plenty of other issues.

But from that video, the only thing I've seen happen in real life so far is leaks in other topics here, plastic intake manifolds cracking at 2 bar boost and engine mounts (mine).

That saying, here is a list of issues I've had outside warranty which I had to pay for over 7 years

◾ 1 injector stuck
◾ Purge valves
◾ Coil packs replaced 2 times
◾ Rear diff replaced
◾ Punctured factory front aux coolers
◾ Leaking coolant hoses
◾ Front fender makes a squeak
◾ Creaks in the front driver's seat
◾ All 3 exhaust flaps jammed twice
◾ Fading night package trim on front bumper
◾ Front ball joints
◾ Fading front black roof trim (goodwill warranty)
◾ Cracked leather seats
◾ Both active engine mounts
◾ High pitched whine at 70kmh and 110kmh since new even after diff changed
◾ Factory RXC wheels buckled twice

But this is over a span of 7 years and some things are maintenance but I put my whole list up anyway.

After I fixed all my issues I tuned the car to Stage 1 and now I'm running hybrid turbos around 700hp at the crank on low boost. I won't be doing anymore modifications and just concentrate on maintenance and restore.

Below is an example of cracked facelift (smaller) manifolds in that video from high boost tune etc. But I'm positive prefacelift (larger) manifolds would crack at that boost pressure too

LR63s

i had to replace my left side motor mount , took some work but isn’t to hard to replace as long as you got a lift , right side is even easier

Jimmy_c63s

Can I ask what symptoms you experienced (sorry for my wording) to make you check your mounts? Were you getting any funny noises eg. a thud or a clunk on light acceleration?

These are my two cracked active engine mounts. Did yours have those cracks too?

George_1992

For the other bros my 2017 coupe had similar issues and list of problems...... I posted my list up somewhere on our forum. Honestly have not seen leaks yet or thermostat just had both engine mounts changed too

Shlick96

Thermostat went out at 14k
Rear shocks blew at 18k
Turbo inlet boot tore at 21k same one in the video with the breather hose connected to the crankcase oil separator
Currently turbo’s “whistle”under load

superswiss

None of these issues so far at 34k miles with my 2019 FL. Just had the spark plugs done during my 5th service. The video is pretty general and no models and model years given. The oil separator issue appears to be limited to the E63 and G63. Not sure what's different there, but there haven't been any reports on the C63 as far as I know. My only issue with the engine was the oil level sensor was faulty and started to give false oil warnings starting from the second day after delivery. It was replaced during the first service, but then came back last summer and I had a misfire after a canyon run on the same day. They updated the ECU and both issues went away and I noticed the oil runs cooler since then for normal driving. They seem to have adjusted something with this update.

jopsis_c63s

Hi!!
My wagon is from January 2017 and have 110.000km It's mine since 2019 with 45.000km and Stage 1 since 50.000km.

This is my list:

• Front radiators cracked.
  • Put Alpha Competition
• Purge valves (I hate the "tiki tiki" sound hahaha)
• Exhaust flaps
  • Only put Ceramic Grease
• Diff mount
  • Replace for new one
• Belts and pulls
  • Replace all (both sides)

Regards!

Jimmy_c63s

Thank you too for your list! What made you replace the diff mount? Was there a knocking noise? I am asking because I have not changed mine since new and want to know if I should do it 🥴

jopsis_c63s

Hi Jimmy,


You can hear it on this video, it is a "open old door" noise.

Regards

dctwc63s

I'm currently a bit over 50k km on my FL and I'm not sure if my engine mounts are about to go. Only recently the car slightly (enough to annoy tf out of me and my ocd) shudders like unbalanced wheels in sport+/race in 8/9th gear accelerating from 110km/h onwards. Then again it also just feels like the engine working but never noticed it before.
Does anyone know the general life span of the active engine mounts in the s model? I do hoon around alot though.

koifysh

Mine is 2018, waited 8 month for it to be shipped from germany.

problems:

1. Alignment problem since delivery. steering keep going off centered. Turns out to be the rear arm that adjust rear toe angle. Replaced it with carbahn after market arm. Problem gone

2. Up until 70k miles, clunk in steering when turning to either side. Worn steering u-joint.
3. Purge valve causing loose gas cap message and misfiring after filling up gas.
4. Misfired on heavy throttle. Bad Ignition coil
5. All 4 shocks went bad
6. Engine mounts showing signs of wear. Need to replace that
#2-6 all occur during the 70k miles period

koifysh

mine does it too. These shi** engine mounts are known to go bad

superswiss

I'd like to think that AMG improved the dynamic engine mounts over the years. However, the FL '19s and '20s, don't remember if the '21s were affected as well, were subject to several service campaigns related to the AMG Drive Unit. They were coded incorrectly from the factory affecting the correct functioning of the dynamic engine mounts and the e-diff. The issues made themselves noticeable by noises coming from the engine mounts and the e-diff. I personally didn't notice any noises, but at highway speed with the suspension in Comfort mode I wasn't happy with how the car changed lanes and negotiated bends. It felt loosey-goosey and unprecise. As far as I know, AMG changed how the dynamic engine mounts are controlled in the FL. They used to be tied to the drive mode, but are now mainly tied to the speed. I'm wondering if that may also reduce stress on them during daily driving around town with many direction changes. At low speeds they are relaxed, and at higher speeds they tighten up regardless of the mode. So I believe mine didn't tighten up at highway speed which led to the loosey-goosey feel. It was better with the suspension in Sport and that's still how I have my Individual mode configured for highway driving and the open road, but since the service campaigns, the loosey-goosey feel is gone in Comfort mode at higher speeds. Has yours had all the service campaigns taken care of?

jj18

Also no issues with any of these listed problems/concerns/repairs so far with my 2019 C63s coupe at 29,000 miles. But I am concerned with these future issues.
. So early April will be in for 5th year MB Service (about 30,000 miles)that includes Spark Plug change. So I plan to mention that the AMG Tech closely inspect the issues listed on this post. I purchased the MB Extended warrant so hopefully anything noticed will be covered.
Did you fell a substatial difference in performance right after the new set of spark plugs were installed? I ask becuse I know it is required to be done at 5 years/50,000 miles Service but my car at 30 000 miles is running like butter so not sure how much better it will perform for me with new plugs?

superswiss

Nope, the new spark plugs made no difference. More of a piece of mind.

dctwc63s

I haven't had any service campaigns done in regards to the engine mounts that I know of, haven't had any noises coming from the engine mounts or diff either. Mine has never felt loose like you described though. Could always feel a difference in the mounts in different drive modes since new. Maybe I'll just get my wheels rebalanced to see if that fixes the issue since I did get new tires a few months back

LR63s

My car would thud when I hit the gas or let go very loud. At first I thought it was because of tq level. When I went to check it I noticed my engine mount on my driver side was missing the screw , and it became threaded so that’s why I had to replace. I don’t know why they said drop the engine maybe so they charge the 22 hours labor? But it took less than a hour to do on the driver side , passenger side is even easier because nothing is in the way.

LR63s

I have 2015 46K miles (22k miles my ownership 3yrs)
main battery
aux battery
driver side engine mount
one ignition coil
all spark plugs
2 rear driver side axles
differential

superswiss

I would check that all the service campaigns have been done. There were three if I remember correctly. It's in a thread around here along with the service campaign numbers. I'll post it if I find it again. The campaigns were for the AMG Drive Unit, not specifically the engine mounts or the diff. The AMG Drive Unit basically wasn't controlling the settings correctly for the engine mounts and the diff.

Yeah, if you haven't done so, get the tires road force balanced and rule that out first. Spin balancing doesn't align the high and low points of the tires with the wheels and road force balancing will also bring to light if you have a bent wheel or the tire is faulty. You wanna get the road force below 20 and ideally below 10.

frostydc4

When were the service campaigns rolled out?

superswiss

Summer 2020. I found the one related to the engine mounts.

https://static.nhtsa.gov/odi/tsbs/20...79973-9999.pdf

dctwc63s

Thanks. Will get it all checked at next service.

Ksun_w205

MY 2017 with only 38k miles so far owned since 2019. Personally never experienced any of these issues. Only front bumper trim is fading, some interior squeaks, and recently the Assisted Brake Function is Limited warning came on which I read is just a software update. Hopefully I won't run into these issues, car has been a blast to own so far.

sammyboy_dds

I heard the same thing, but upon taking a look at the mounts location it doesn't seem that bad? Much easier than the w204 generation. Also what where did you find the torque specs for the 3 lower bolts and the one up top? Ive been looking everywhere but cant find anything. Thank you!