Hello Everyone, New member and great site

Noise question. HAve a 98 w/122K purchased 7,000 mi ago. on Cold starts and particularly in reverse and in right turns the car rumbles quite loud and noticeably. I have ruled out bearing as the rumbling goes away as the engine get up to temp. Have had no other issues with the car but this is annoying as the air temps are now lower. Seems to be engine related as the noise is reduced if I put the trans in Neutral as I coast downhill out of the drive way. Any suggestions would be appreciated

Engine mounts could be the problem. Weak on the driver's side, so the engine leans over as you make a right turn. Its a heavy engine.

Those were the exact symptoms of my 1998 E300D TurboDiesel, and as suggested by the Parrot of Doom, the engine mount on the driver's side was the culprit. I just replaced it a few days ago and the machine now runs smoothly again. Jim

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Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)

Thanks for the help...will check this weekend

I had very similar symptoms. All my engine mounts had to be replaced plus one tranny mount.

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Ed
-1984 Mercedes 190D 2.2 5-speed gray market(bought@30,000 miles) (Sold back to original owner@170,000 miles)
-1999 Mercedes E300DT (245,000 miles)
-1999 Mercedes S500 Grand Edition (80,000 miles)

I also have the same symptoms and believe the motor mounts are to blame. The noise is similar to a wheel bearing groan but goes away when you put your foot on the accelerator...it's my next project once I replace my leaky fuel lines.

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz

Chances are you'll have to remove the mounts to check their condition, as the weight of the engine often compresses any cracks/faults so you can't see them.

I can confirm that my rumbling noise went away completely after replacing the 2 motor mounts.

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz

Don't forget the transmission mount, located at the back of the gearbox. Its a rubber block, easily replaceable. I'm checking mine this week.

If those mounts are original, don't even bother checking them. Just have new ones on hand and replace them as all above have said. Just did mine a couple of weeks ago. Same symptoms as you, but maybe not quite as bad. Do a search. Parrott of Doom and I have posted pictures with part numbers in another post.

Len

I just dropped my 97 E300 off at my Indy last night to have the same issue resolved.

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Dennis
2006 E320 CDI Black/Black Leather. Nav, HTD Seats HK stereo 32000 miles.
2000 VW Passat 1.8t 300,000 miles as of Dec 09, 2009 original owner
1997 E300d Silver 300,000 miles As of Jan 05, 2010
3rd owner SOLD

Replaced both mounts this week...in a word unbelieveable sitting inside you think it's a gasser. Driver side Mount was split all the way around

Sololoff, did you do the transmission mount as well? If so, what was its condition?

The weather here is terrible, I've not been able to get under the car so far to have a look.

This is a picture of a new mount:

Just picked mine up this eve and I fully agree. Makes a world of difference, it even got rid of some of the slop when I am coasting to stop and transmission downshifts. The mechanic told me the transmission mount was fine. Funny thing the dealer last week couldnt "replicate" the problem, even though I told them to check in the morning when its cold they waited until noon and temp was in 50's so it wasnt noticeable. Supposedly they "looked" them over and I was told they were fine.

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Dennis
2006 E320 CDI Black/Black Leather. Nav, HTD Seats HK stereo 32000 miles.
2000 VW Passat 1.8t 300,000 miles as of Dec 09, 2009 original owner
1997 E300d Silver 300,000 miles As of Jan 05, 2010
3rd owner SOLD

I have not replaced the transmission mount, but I probably should. It's only about a $20 part. I ought to make it part of my 100,000 mile service. Have you done yours? Easy to do?

Len