For any of you who are recent diesel owners, as I am:

Purchased a 1985 190d several months ago and assumed that some fairly
significant vibration and noise were to be expected. However, I
recently replaced the motor mounts and had valves adjusted, and I can't
believe it's the same car.

Vibration is virtually eliminated, noise level reduced dramatically,
effortless starts and smooth take offs / acceleration. Did not know
older diesels could perform as well as this. Almost feels like a
gasser.

Motor mounts were originals and the valves obviously hadn't been
adjusted in some time, but the improvement in performance is
extraordinary. Makes me wonder if some people get rid of diesels
prematurely - when all they might need is mounts and / or valve
adjustment.

I would not expect motor mounts are a routine maintenance item, but
with the torque and vibration of diesels, I suspect that 20 yrs is well
beyond expected life. Can anyone tell me a recommended or reasonable
life span for motor mounts on the 190d (manual)? Also recommended span
between valve adjustment?

I'd appreciate any help. Thanks.