I have a S420 '95 in which I decide to change the broken cruise control switch.It was my mistake that I didn't follow the instructions where they said to disconect the battery, so while I was working at it I decided to open the window and I put the key ON while the air bag unit was disconected. And that was it, the SRS light came on and stays since on. I know that everything is ok because before it never light up and the only thing I did to it it was disconecting the airbag.Please I need some help to reset this light.Thanks

Under FEDERAL law you need SCANNER to reset.

__________________
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

Maybe in US, currently the car is in Mexico and I don't think the FEDERAL does apply here. Plus I think the FEDERAL applies to shops or commercial facilities not to individuals.
I still need help to reset the light otherwise I'll have to remove the bulb out, and maybe I'll get into a FEDERAL witness removal program, lol.

MB Doc - couldn't he read/reset the codes on the 38 pin adapter (pin 19 is SRS i think) - or is there another system that needs to be reset.

Does the 1995 w140 require the hand held tester or can it be read/reset with a simple impulse display?

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Daily Driver: 02 E430 4MATIC
In the family: '03 E500 // '04 ML500 // 64 220SE

To start with all MB's from 1988 require a scanner to bring up & erase SRS codes...The 1994 & later MB's require digital scanner equiptment to do that!

That includes Mexico!

__________________
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

What type of Scanner are you guys reffering to?

I got a 2003 w220 s500 that the SRS light come up on. I've traced the problem to a Driver's air bag that was replaced and the wires were badly spliced (not soldered). So now I need to reset it.

What's the easiest way and what kind of scanner do I need? an OBDII scanner?

I think they are referring to a $2500 scanner.