mercedes 609d clanking noise

[kenmoore]

my mercedes 609d has developed a clanking banging noise underneath when being driven seems to be coming from front when accelerating when decelerating slight noise at the back can anyone please help me

 

[Sprint'n'Go]

That's a very vague description of the problem but I will give you a start. If the noise happens when going over bumps then check all the shock absorber bushes front and rear and also any antiroll bushes as these can cause a funny rattleing sound if worn (worn antiroll bushes are obvious as the bar will slop about in the bush visibly.

If it isn't a suspension noise then check the universal joints on the propshaft, there should be no play in them otherwise they can cause a lot of vibration/knocking and will soon fail catastrophicaly if not fixed.

 

[kenmoore]

noise dosent happen going over bumps when accelerating it sounds like metal against metal as though being hit with a mash hammer really loud bang, clank

 

[Sprint'n'Go]

Well it definitely sounds drivetrain related. If you can't pin it down yourself you really should take it for a professional opinion asap. It sounds like it could be serious and might fail without warning if left unchecked.

Without being there to see for myself I would say it could be broken gears in either the gearbox or axle or still worth checking the propshaft. If it is that noisy a propshaft fault should be obvious.