glow plug lite doesn't always come on, then the car will not start?
 
                We have a vw passat 1993-94 L reg.  The glow plug light works intermittently.  When the lite does work, the car starts, however when not working the car doesn't start.  Is there a relay swith or something else that may be at fault?  Thanks
            
             Tom Weinert
            
 December 2010