CPS is the crankshaft position sensor. Its a common failure on the 112/113 engines and exhibits the exact symptoms you describe.
[IMG]http://www.***************/secure/PartImages/0261210170.jpg[/IMG]
under $100 for the parts, Medium difficulty DIY job and a E8 Socket is required.
http://www.***************/search/product.aspx?sid=szlphp553qzvov45zhcjyw3h&makeid=800016@Mercedes&modelid=1363890@ML320&year=2000&cid=sensor@sensor&gid=7196@Crankshaft%20Position%20Sensor
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1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic
past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350
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