My car has had religious oil changes most of it's life... even more so in the past 30k miles (90k miles total).
Well the reason I ask this is because when idling, the engine doesn't seem mellefluous. When revved, the engine just purrs, but when idling it sounds like... (hard to explain), kind of a slight rattling. So I bought a new radiator mount (one was missing) and a new fan cover bolt (one of the 2 was missing, just the plastic snap on kind). But it didn't help. I have heard about this timing chain rattle on start up with other models. The noise is slightly louder when the engine is cold, but everything in the engine seems louder when cold.
How costly is the replacement of a timing chain? What differences are noticed if it's done done?
Are you saying that if you change the oil often enough, the timing chain could partially heal itself?
2006 E350 w/ 155k miles (Daily Driver)
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!)