1998 W210 E300.

Sunday I was loaded up and about to leave the track for home, insert key, Glow, turn key to start... Nothing. battery is fine.
I did this several more times over a 10 minute period. I tried neutral/park/ and neutral again suspecting a trans switch. Still nothing. No noise no indication of life nothing. Everything else operated as normal. Everything on the dash cycled as normal, glow plug sequence appeared normal. The Climate control fan was blowing strong (power seemed ok). But turn key and NOTHING.

After 10 minutes, finally another attempt and the 'start sequence' executed.
I drove 5 hours home stopping twice and never shutting the car off.

Monday morning, it started fine.

Any insight?
Suggestions?

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