1984 300SD

a couple of month ago i had the car parking for a week while i worked on a suspension issue. once i got it up and driving again i had this weird noise. sounds to me, and i thought it was that the exaust was hitting the inner body. its a knocking noise. its not constant, more loud at some RPM, and when i turn one direction or park on a hill. for example when i shift i will usually hear a couple of knocks. i ran my hands along the exaust and couldn't find anywhere that it could be hitting, but this was with the car in park.

after about a week of this it went away, completly!

last week i had the car worked on at a shop (guide rod mount), when i picked up my car it started again, they had it parked for 2 days before i could pick it up! not as bad as the first time but i don't know what it could be. its hard to hear it from outside, but it seems to be amplified in the interior. from what i can tell its coming from the right side of the radio (passanger side) of the transmission hump or around that area.

can anyone point me in the right direction?

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198? 300D ???K - Future DD
1989 300TE 285K - traded in '12
1984 300SD 186K - Sold in 08
1978 300SD 330K - Died in 05

Take a close look at your flex pipe. It runs down the passenger side where you describe the noise coming from. (617 turbo engine right?)

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

center bearing

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'85 300D Cal 280,000 miles
'14 GLK 350 60000 miles

on the propeller shaft?

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'85 300D Cal 280,000 miles
'14 GLK 350 60000 miles

if you punch the throttle does it make the noise?

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have no worries.....President Obama swears "If you like your gun, you can keep it

it makes a noise when the car shifts gear, like what ever is hitting comes in contact for a second during the shirt.

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198? 300D ???K - Future DD
1989 300TE 285K - traded in '12
1984 300SD 186K - Sold in 08
1978 300SD 330K - Died in 05

how does the transmission mount look?

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have no worries.....President Obama swears "If you like your gun, you can keep it

probably not good. haven't changed in in my ownership. do u need to jack the trans up to inspect it?

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198? 300D ???K - Future DD
1989 300TE 285K - traded in '12
1984 300SD 186K - Sold in 08
1978 300SD 330K - Died in 05

crawl under and push up and side to side on it. if it seems to really move and or you can see its broken,replace it.

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have no worries.....President Obama swears "If you like your gun, you can keep it

turns out an exaust clamp loosen itself and allowed the exaust to hit one of tghe bolts on the cross member. i am glad it was a simple fix. thanks for all advices given

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198? 300D ???K - Future DD
1989 300TE 285K - traded in '12
1984 300SD 186K - Sold in 08
1978 300SD 330K - Died in 05