Mercedes: 89 420 SEL Starting Problem..., jumper cables, starter solenoid


Question
Last night I went to the gas station and filled up, turned the key and all I got was a click, I can hear the starter solenoid engage but not rotation of the starter. After tinkering for about 2 hrs at the gas station, some guy gave me a jump start, it did not appear to be a battery problem as the lights all worked, and even with the jumper cables on it would not start, then suddenly it sprang to life.

I drove the 2 miles home let it idle a while without the lights on, turned it off, tried to start it again, nothing just a click?

Any ideas?

It normally has been starting first time, the batt does not appear to be flat, no slow cranking, just nothing.

Answer
Answer:

Best guess:
#1. NSS = neutral safety start switch bad.
#2. Starter bad.

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No-start help for beginners.          
http://www.mercedesshop.com/shopforum/showthread.php?p=1076969

Automotive repair training book on line, you can download it.
http://www.tpub.com/content/construction/14273/

Good MB Shops
http://www.mercedesshop.com/shopforum/forumdisplay.php?f=14