Bad injector or seal on #5

Vacuum leak on manfold gasket around #5

Fuel distributor not "distributing" to #5 - crack fitting at injector slightly and see if it is getting fuel

Valves out of adjustment?

Here's a post on the Vintage Forum that may be of help:

http://www.peachparts.com/shopforum/showthread.php?t=106616

__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe