Hello people. I found a really good deal on a 1999 C180 sedan locally, but the owner says the car doesnt crank or start because of the key not communicating with the car. He also told me there was previously also a problem with the steering wheel lock but they managed to fix that. Is it the eis module, and would replacing it solve the problem? Or what else could cause this, and how expensive of a fix is it if i do everything myself?