By the information in previous posts, I believe I may have a vacuum leak on my 300E 2.6.
Symptoms are slight surge on gentle acceleration and demist comes on during hard acceleration. Is this likely and is there a most common point where leaks occur?
Many thanks for advice that anyone can give.

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Tony
76 W116 280SE
74 W107 450SLC
88 W124 300E
82 W123 280TE