SRS light

[lsg]

my srs light is on in my 560sl.my local mechanic said i needed a new new control unit at a cost of $1500.Should i have my mb dealer look at this and does the price sound correct.

[stevebfl]

The early control units had no diagnostics. Only the system could be tested. The next versions which you might have (you didn't state year) have impulse diagnostics and if the code ten is there then a new module is the answer.

The box for cars through 1987 004 820 11 10 should list for 1070. The unit for cars 1988 on use 000 820 68 26 at 1380. They aren't exactly easy to get to so 1500 could be a good price if it included labor.

Used parts are an alternative. Both devices selftest, so properly installed and system tested, used parts can save a bunch of money.

[lsg]

thanks steve,I have a 1989 560 sl.

[BobH]

lsg,

I recently had the same problem on my 1990 300SL. The dealer diagnosed the problem as the SRS control module. The cost of the module was $1281.00 and the labor was $136.00.

Bob