I went out to start my '82 300D turbo and the glow plug light did not come on? I switched the key on and off a couple of times, still not light. I then turn the key and waited ~20 seconds, the normal time for the glow plugs to heat up in the morning, then cranked the car to see if it would start, but had no luck. Any suggestions on the problem or how to trouble shoot to find the problem? thanks in advance
Side note: the other day the vacuum on the brake booster and engine shut off went out, I think its that diaphragm but have not fixed it yet.