Ernie and Ray,
Taking the air cleaner pot off and using my neighbor's 6mm ratchet spanner did the trick for the right grill. Fortunately the left one is still OK, so for now the radiator stays in place
.
And a push from the side with a wide blade screwdriver released the clip holding the vent lines.
So, 2-for 2, not a bad Sunday
- but fur sure your suggestions made the difference, thanks again!
Alfred
1966 blue 230SL automatic