Seen several threads describing the NSS is a lock-out - and a car (E420) would not start.

What is the NSS, and where is it located?

The NSS and OVP (Over Voltage Protection) are things I think I should understand. The OVP needed changed in the 300E - battery kept loosing a charge.

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Thanks for the help
Bill Fisher

'86 560SL (186K) - Now a 'classic' : Registered as an Historic Vehicle
02 E430 in the stable
'14 LS460 (Lexus)
- - - - -
'95 E420 (198K) found a new home
'99 E320 (80K) (gave it's life for me as we hit a bumper)
'95 E420 (231K) Sold to a happy buyer, new to Mercedes
'90 300E (65K) Sold to an Mercedes Lover
'92 190E (215K) - retired to the salvage yard
'93 500SEL (214K) - Moved to another family, still runs like a young pup