2006 gasser seems kind of new. should be ok but emissions are stricter in Ca.
don't sweat it, she can buy a Merc diesel !!
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1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
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1979 240D 140Kmiles (bought for parents)
*SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD