The official M-B engine manual calls for .012"/.30mm clearance on the exhaust valve for a cold engine, .014"/.35mm for a hot engine. Someone may have been providing the hot engine clearance measurement.

Good Luck!
Tom

__________________
America: Land of the Free!

1977 300D: 300,000+ miles

American Honda: Factory Trained Technician & Honor Grad.
Formerly:
Shop Foreman;
Technical Advisor to Am. Honda;
Supervisor of Maintenance largest tree care co. in US for offices in Tex.