Upper left near oil fill cap or lower near gearbox?
I found this from forum:
A hollow knock from the front right at low temperatures is the upper engine mount (also called 'stabilization bar' or something similar).
This is normal, most 197s & 200s have this noise, in most cases it goes away when the engine is warmed up.
If the noise is always there, then replacing said mount will cure the problem.
However, the problem described in this thread is completely different..
Okay, just what i have.
Is that fixed by changing that upper mount?