Have the fuel system pressures tested. If it's not holding "rest" pressure it will cause a hot start problem. It could be the fuel pump check valve,fuel accumulator, or the fuel distributor. Have a CIS System test done...if the shop you use dosn't know what that is, leave.
Randy D.

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W.R.Durrance
ASE Master Tech
Mercedes Tech 21 Years
68 250SE
68 SAAB 96 Ice Racer
69 300SEL 6.3
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81 300TDT
W.R.Durrance Engineering