Test driving a 2001 E320 wagon and has a throttle problem. M112 engine.

Sometimes doesn't respond at all to first inch of pedal press, then suddenly takes off fast a second or two later.

Seems like something electrical but what?

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Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles