Hello Every1
I have a 1994 E320 W124(Located in Canada) and i just recently did a head gasket change on it since it was leaking oil. just right after this was done i got the car back and it runs fine when driven slowly or at low revs, but as soon as the gas pedal is stepped on hard or more power is required the engine makes this crunching noise and the car shuts off right away(any rpm above 3000 it happens). So i was under the impression it would be the timing chain tensioner but i got a new one put in and still dint make a difference so i have no idea what else it could be(the wireing harness has been changed already last year). The mechanic i took it to is not a MB master tech he is just a regular mechanic and he says it is most likely the throttle valve actuator which i doubt. So i have attach a small video of the engine i took wit my cell phone dont know if it might help or if it is clear enough. Any advise or help is really appreciated from you masters out there.

The video can be downloaded from this link
http://rapidshare.com/files/176442438/94_W124_E320.mp4

Thanks for having a look