No. A timing chain
The 1.8 liter four cylinder engine in a 2003 Mercedes C230 has a timing CHAIN
belt tensioner r@r 04 mercedes c230 1.8.sc
The SLK has a timing chain which lasts much longer than a belt.
The engine does not have a timing belt. If you are referring to the serpentine belt (the long belt that runs around the pulleys), it should be replaced when it shows sign of age. I replaced mine at 65k miles and it looked new. I hear people replace them anywhere from 80k - 90k miles. once
its got a timing chain not a belt
Timing chain
timing chain
Timing chain
If it's a "chirping" noise, then you don't have the belt tight enough.
1998, 318 is fitted with a timing chain not a timing belt.
It has a timing belt.
It has a timing chain.