estimate for electrical work on 1998 BMW 528i

I've had the radiator fixed so now I think its time to have the electrical system checked out.How much should something like this will cost me

Asked by for the 1998 BMW 528i
Why do you think the electrical system needs to be fixed or investigated? Are things not working or working intermittently? Electrical problems are usually poor grounds or power caused by corrosion or wiring damage due to rodents or people working or modifying the car in the past. There is no set charge for electrical diagnostics, shops here in CA charge $100 to $125 an hour and would start with an hour diagnostic charge. A person that specializes in BMW may find the problem quickest.
so what about the windows on the drivers side will not roll down and the power lock on the drivers side will not work it seems like an electrical problem to me.