My 1995 Mercedes C280 with 140,000 miles is experiencing engine knock under engine load, more so with a cold engine. Sometimes, the knock is bad enough that it shuts off a cylinder, and I must restart the car to restore full power. I also notice some hesitation under full throttle acceleration, many times shutting off the cylinder(s). Awhile back, it was determined by the MB dealer that I did have one weak cylinder coil and it would need to be replaced. I am only using 91 Octane and almost always Chevron gas. Must it be the coil? Plug wires are fairly new too.

THanks.

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2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)

I think I'm going to go ahead and buy the new coil and a new fuel filter.

__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)