I've had an intermittent fault on a glow plug since I had the car. The car is coming up to 93,000 miles so they could probably do with a change. I'm lucky enough to work with someone who's other half works at VW so I asked for a quote on the change of all four plugs. I've been quoted £88 which when I look at the cost of plugs seems a bargain as I'm pretty much getting the labour free. I know this is something you can tackle yourself but I'd have to buy a torque wrench and I've read of some people cocking it up so for peace of mind £88 doesn't seem to bad. What have you guys payed in the past or do you do your own?