Do you get any missing at idle? I was having some of that recently and now that the new cap and rotor are on it idles low but has not had any missing for the few miles I have put on it. The fuel accumulator is typically the fix for the 2 required cranks on a hot start on a hot day. I did replace mine as well after i verified that the cap and rotor are working. It does start easier now but its only 40 degrees outside during the day. Not the best of tests.

Beware that while removing the cap you can catch the rotor button pretty easy and break it. I think I damaged mine last summer when i put on the new suppressor housing. I have a W126 so if you have a 124 it may have more room. I replaced that cap not long after I got the car and its been almost 2 years.

I think your having a similar issue to mine? check or replace the cap and rotor and pull all the plugs and check the gap. Start with the easy stuff before you get into $$ just to be sure. Good luck and be persistent and methodical. Its the only way with these cars.

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Current
1989 300SE - Siegfried
2010 Toyota Tundra Crewmax
2005 Honda CRV

Gone but not forgotten
2001 F150 Supercrew - The Screw
1966 Ford LTD 390 - The Big G!
1995 Mercury sable
1986 Subaru DL
1982 Ford EXP - my first car