I will guess low fuel cetane.
Nate could chime in here with fuel quality and additives. Bill in Oregon
From: diesel_mercedes@yahoogroups.com [mailto:diesel_mercedes@yahoogroups.com]
Sent: Sunday, August 24, 2014 9:51 AM
To: diesel_mercedes@yahoogroups.com
Subject: [diesel_mercedes] 300D car vibrates at idle
Just getting familiar with the mercedes and have had no other experience with them.A new to me 84 300D vibrates very loudly at idle.
It is so noticeable that the sunroof is making a loud hum.
I just got the car started this weekend. Owner had said the trans quit working and had lost the ign key.
I picked up a key and ign at the junk yard and added some trans fluid since it was about 1.5 quart low.
car seems it will drive fine now but have only drove it in the yard so far.
when it is at idle there vibration all over the car so anything that will make a noise or hum does so.
Rev the car up and the hum goes away.
It is possible I just need to idle the car up.
It kind of reminds me of the vibration I felt in a TR6 I had when driving and it turned out to the a drive shaft to rearend U joint.
But with the 300D the vibration is at idle in park.
Has any one seen this before?
I have not checked motor mounts nor have I checked transmission mounts.
Posted by: Max temple <jasperezra@gmail.com>
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