Hello guy, one of the few problems my car has is a metallic clunk when shifting between gears and when i abruptly release the gas pedal or put my foot back on it. I had the car on ramps a few times and none of the bushings or flex-discs are shot, everything is tight. I was able to recreate the noise i hear while driving by turning the driveshaft by hand and noticed a play in the diff.
I know it should be possible to adjust backlash but this isn't a job i want to tackle and i've heard about the central pin in the diff wearing out and therefore making this clunk in these Mercedes differentials. I don't know what it is but as a short term solution, i thought about trying a thick xW-140 oil just to dampen the noise a bit before having the time to get this fixed. I suspect this wouldn't make any difference but maybe i will need to get the car up to change the fuel filter anyway, this would be the occasion to give it a shot.
The car made this noise when i bought it with 128k kms. I changed what i believe was the factory fill and it was nasty, really thick and black. I changed it for a 80W-90 that is on the thin side. 20k kms later i changed it again and it was perfect just like the day i pourred it in.
I know it should be possible to adjust backlash but this isn't a job i want to tackle and i've heard about the central pin in the diff wearing out and therefore making this clunk in these Mercedes differentials. I don't know what it is but as a short term solution, i thought about trying a thick xW-140 oil just to dampen the noise a bit before having the time to get this fixed. I suspect this wouldn't make any difference but maybe i will need to get the car up to change the fuel filter anyway, this would be the occasion to give it a shot.
The car made this noise when i bought it with 128k kms. I changed what i believe was the factory fill and it was nasty, really thick and black. I changed it for a 80W-90 that is on the thin side. 20k kms later i changed it again and it was perfect just like the day i pourred it in.