I have a '91 300d that while taking a trip today.....the SRS light came on several times but went out after a few seconds. What does the dealer do to fix the issue......does the system need to checked by a shop or is there something I can do?
thanks for reading

You can build the code reader and read the codes on pin 6 of the diagnostic connector. Try a search - lots of info.

Voltage supply is the only reason that the light can go back OFF w/o connecting scanner on that model.

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

MBDoc is absolutely right.. I have seen this on many of my cars, and it is always one of two things:

Overvoltage protection relay
-OR-
Battery

The OVP relay is a known cause of this problem, and it has a 10A GM-style fuse in the top of it.

Battery getting old is also a common cause.

I used to troubleshoot these issues, but now here's what I do. For a total cost of $100-150 (depending on the battery), I buy a brand new OVP and battery.

Unless your OVP or battery are less than a couple of years old, just buy new and you'll fix the problem forever. There is no point in trying to spend $$$ troubleshooting this type of issues when 90% of the problems are solved by spending the $100-150.

__________________
'83 300SD 335,000km (207k) mi SOLD
'87 560SL 163,000km (101k mi) SOLD
'86 300SDL 356,000km (220k mi) SOLD
'92 500SEL 250,000km (155k mi) SOLD
'90 300SL 140,000km (87k mi) SOLD
'01 S430 260,000km (161k mi) SOLD
'03 SL500 167,000km (104k mi) SOLD
'07 S550 4MATIC 235,000km (146k mi) SOLD
'07 GL320 CDI 4MATIC 348,000km (215k mi)
'13 GL350 BlueTec 4MATIC 170,000km (105k mi)
'14 SL550 72,000km (43k mi)

This recently happened to me as well, except my SRS light came on and hasn't turned off.

I have a 2003 CLK500, which hasn't been in an accident (knock on wood) and my SRS light came on the other day - it happened right after I filled up gas (I dunno if that matters at all). The battery was replaced in Oct-2007, so I don't think it could be the battery. You think it's likely the OVP or should I just take it to the shop to have them look at it? Would something like this be covered under the extended warranty?