PLease forgive me as I am new to the w140 Gasoline SEL world.

Went to auction and a 1992 MB 500 SEL is there, while checking out the car, I noticed that the ASR/ABS light is on the dash. The car had to be jumped to start (battery is clearly gone in this thing) and understand that low voltage can trip these systems up.

Question is, in worst case scenario, would someone comment on the cost of ASR repair? Is this something I can do myself or do you need to buy a lot of special tools?

Thanks
J-