One more thing.

The SRS CRASH SENSOR is located behind the ashtray.
However, you might have gotten water in the SRS control unit.

The SRS unit is one of the 3 computers (1, 2, + 3) (ECU/ECM) that is in the engine bay behind the firewall on the passenger side... "protected" by the flip-up plastic panel. Not as secure as the 96+ C-classes.



A dealer service is basically the only way to go.
Good luck!

__________________
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!)