Retest is free in CA within 30 days.
There was a tune up done when I bought it, 2001, 24K miles ago.
An oil change is on my list of things to do.

Craig

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1994 E420, Pearl Black/Black. 2.82 rear diff., AMG front spoiler, painted lower half. SOLD

1972 & 1974 BMW 2002tii's.