Is it possible that a bad battery would cause a problem with the glow plugs? My glow plug light has been turning on for about 30 seconds after I first start to drive. This has been coupled with a bad/ cold start in the morning. The reason I ask about the battery is that these problems all started after my battery started going bad. Is it possible that there is a connection?

 

I'm not familiar with this but the answer may be car model dependent, perhaps you should give more details to help experts providing answers.

 

Good point, thought that it was part of my profile. The car is a 1995 E300D.