Coolant glow plu relay on mk4 jetta

[MAXRPM]

I got a code could be the coolant glow plugs,, my 4 engine glow plugs and harness are good, im trying to figure out the coolant glow plug relay where it is, that's the next thing to check

 

[jayb79]

Coolant glow plugs will not set a code they are not monitored.
Check post #9 here shows relay location,

Coolant glow plugs -effect on warmup

I had seen the question asked several times, but not definitively answered. So I tried to find out. I force the CGPs on one day, and let the car idle for 20 minutes. Then the next day (almost identical temperature profile overnight) I forced them off and did it again. I recorded the...

forums.tdiclub.com

 

[MAXRPM]

It appears to be relay 180 underneath the dash for coolant glow plugs but I remember members talking about relay 109, so it is confusing