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Hey guys,
my car is 2017 E300 with 106k km on it. I changed all spark plugs when it was around 70k.
yesterday I was driving normally, then out of no where the engine kept shaking. after that the check engine sign showed up.
when I park it it is shaken, drive it between 0-40 km/hr there is a shake but once i keep it above 60km/hr the shake is gone.
I drove it to the workshop, they plug it to the computer and the result is one misfire and I need to replace the coil with spark plug. I order the part and parked my car until the parts arrive.
Should I check more maybe the issue is different and worse?
Should be fine, hopefully just a bad spark plug, if after changing the spark plug and the coil everything is back to normal then you shouldn't have an issue. Keep us posted please.
Should be fine, hopefully just a bad spark plug, if after changing the spark plug and the coil everything is back to normal then you shouldn't have an issue. Keep us posted please.
I am waiting for the parts to arrive by tomorrow and then changing them,
one workshop I called, told me to not change the coil&spark plug he said just add MB fuel cleaner and drive for one hour and everything will be back to normal.
Quick question I am afraid there is a piston failure, will the computer diagnostic show that?
Certainly doesn't hurt to use Mercedes OEM cleaners, try that first as they suggested.
As for piston failure, yes a computer (Xentry) can certainly check that, other diagnostic systems may be capable as well. Monitor the speed of all cylinders using the diagnostic systems, if one is not within operating threshold then check that one. You can also do a compression test and see if it passes, if it shows a cylinder revving way faster or slower than another, then there may be an issue with that cylinder.
Certainly doesn't hurt to use Mercedes OEM cleaners, try that first as they suggested.
As for piston failure, yes a computer (Xentry) can certainly check that, other diagnostic systems may be capable as well. Monitor the speed of all cylinders using the diagnostic systems, if one is not within operating threshold then check that one. You can also do a compression test and see if it passes, if it shows a cylinder revving way faster or slower than another, then there may be an issue with that cylinder.
I'll use the cleaner today and drive then see if it is gone. IF THE SHAKING IS GONE, I might postpone the replacement until I reach 120k km
for the testing he used (Xentry) and told me it is minor issue of spark plug and coil replacement.
I'll use the cleaner today and drive then see if it is gone. IF THE SHAKING IS GONE, I might postpone the replacement until I reach 120k km
for the testing he used (Xentry) and told me it is minor issue of spark plug and coil replacement.
Yup sounds like a plan, keep us posted.
Originally Posted by chassis
Please post the results of a XENTRY compression test.
I had the issue on my '18 E300 when it was under warranty at 12,000 miles. MB replaced plugs and coils. Hopefully it will not reoccur now that the warranty has expired at 4 years and 15,000 miles.
I had the issue on my '18 E300 when it was under warranty at 12,000 miles. MB replaced plugs and coils. Hopefully it will not reoccur now that the warranty has expired at 4 years and 15,000 miles.
Ya it was probably just a bad plug or coil for OP as well. Glad to hear that the replacement solved it for you. Plugs usually require replacement at 100,000 miles the very latest.
Still parts didn't arrive here is the extra pages from the report that I posted earlier,
It shows the following codes
P030085
P030185 (this is cylinder 1 which will we will replace its coil)
P06DA00
I notice the following (the car shake if it is between 1-2 rpm )
once I park the car too it shakes
the eco start/stop is not working at all
oil temperature/ radiator temperature is on good condition.
during my 150km trip yesterday, it wasn't having any issues in highway or any shaking only shaking occurs once i slowdown
I'll start with spark plugs then change a coil and hopefully it is not piston issue
Update : changed all spark plugs & coil for cylinder 1 run a test and now it says there is a misfire but not defined where exactly.
the guy in the workshop told me to drive the car and get back to him tomorrow afternoon to do another test on it.
i drove the car around there is a shake between 2-3rpm
Update:
still the issue is the same with those codes in any test P030085 P030185 P06DA00
they did some test and found cylinder 1 in low pressure
The culprit now is bad injector in cylinder 1, what we will do is swap the injector and check if the pressure will be lower in the other cylinder. If that's the case we will replace the injector. Should I replace one or replace them all?
I am leaning toward an electric issue not mechanical issue, since it happen sudden not rapidly.
Update:
still the issue is the same with those codes in any test P030085 P030185 P06DA00
they did some test and found cylinder 1 in low pressure
The culprit now is bad injector in cylinder 1, what we will do is swap the injector and check if the pressure will be lower in the other cylinder. If that's the case we will replace the injector. Should I replace one or replace them all?
I am leaning toward an electric issue not mechanical issue, since it happen sudden not rapidly.
Hello there
What happened after that? Did you solve the problem because I’m having the same codes..
Please any updates will help us.
yes I fixed the issue. It ended up being a bad fuel injector in cylinder 4. I changed that out along with the spark plugs and the car has been running fine for the past few months. Thank god it wasn’t a bigger issue
yes I fixed the issue. It ended up being a bad fuel injector in cylinder 4. I changed that out along with the spark plugs and the car has been running fine for the past few months. Thank god it wasn’t a bigger issue
Did you get a specific code for the injector?
and what if I cleaned all the fuel injectors with a machine will it cure my problem?
Did you get a specific code for the injector?
and what if I cleaned all the fuel injectors with a machine will it cure my problem?
The code was a misfire in cylinder 4. They tested the coils & determined those were fine so it was ruled to be an injector problem. I would recommend getting the injector changed if the car is misfiring and shaking badly like mine was. These are expensive cars and should be taken care of when needed
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