Wow! Thanks, Gilly. That's some bit of information that I need to digest. This might be a case of a picture being worth a thousand words - is there some way I can get my hands on a copy of the wiring diagrams for my car? Thanks again for the information and I'll be sure to let you know how I make out.

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Robert Fini

'12 ML350 BlueTec, 87k
'06 E320CDI, 270k
'05 T1N Sprinter 2500/Pleasure-Way Plateau TS, 69k
'97 C36AMG, 313k (son's)
'94 E320T, 249k
'93 190E Sportline LE, 168k (daughter's)
'84 190E-2.3/5spd (Stage Rally Racer)
'66 230 W110 Sedan (Barn Find, Vintage Racer build in progress)