crvjim

2010 GLK Check engine light came on and took it to the stealer.Code said thermostat not working right.Sooo new thermostat $198.00,anti-freeze $28.00,V-belt $68.00,labour $260.00 plus tax.Reaming FREE.

rmfnla

It's no secret that maintaining a MB out of warranty can be a pricey proposition...

NVGLK

2011 Glk thermostat was replaced a year ago under warranty. What is wrong with the thermostat

crvjim

Nothing that was really noticeable the temp gage went to 80.The mechanic said it was probably stuck in the open position so the computer picked up that it was not warming up as fast as it should.Now stops at 90.

hondafan

I had to replace the thermostat on my C300 and will likely have to do it on the GLK over the next couple years. It's a fairly standard part and on most cars it's a $10 part, but ours is only sold with the temperature sensor. They fail in the open position, so you end up having the car not fully reach operating temperature, and where the computer expects a higher temp than it's actually displaying, then the car throws a CEL. The replacement is fairly simple, although a little messy. It took an hour to replace and you don't have to replace the serpentine belt at the same time unless it's actually worn (which isn't technically part of the cost for replacing the thermostat). I'm hoping they didn't tack on extra labor for the belt replacement, because that's a part they have to take off to replace the thermostat. My total cost including the part was around $160.

crvjim

Thank you for the info.SA said they have to replace the belt because it gets anti-freeze on it when thermostat is removed and no labour charge on belt.

Showa

OP How many miles on your GLK? I would have kept the original ac and timing belts for at least 90k miles.
I have changed the AC and timing serpentine belt on my BMW when 100k miles for the preventive maintenance. I had found that the original belts were in very good conditions but I changed them anyway. The new belts are Continental brand (genuine BMW). After only 55k miles, the belts look horrible like cracks, splits and in need of replacement.

crvjim

42K , original belt.SA didn't mention wear or cracks just that it was standard to change belt as anti-freeze gets on it when changing thermostat.Guess I got hit with 1 of those unnecessary add ons I have heard about.

RSNovi

Since they are probably charging you labor to replace the belt, why not just take the belt off prior to removing the thermostat which should prevent coolant from contacting the belt? This would eliminate the cost of a new belt.

It if was like $20 or $30 for the belt than might as well just put a new one on. I just bought my first Mercedes so I am not calibrated on part costs yet.

crvjim

$68.00 Canadian

hondafan

I removed my belt and didn't get any antifreeze on it at all. I then wiped down all the pulleys that I did get antifreeze on, made sure they were clean all the way around, and put the belt back on. It's not a necessary part to replace. I would push back personally, but then again, I did my work on it too so I could check the belt at the same time and it was in great shape, no cracks or anything. Honestly it looked just like new belts I've gotten in the past.

bop11

Why would ethylene Glycol have any effect on a timing belt? It is a tooth belt. Just wash it off if you are worried. There are lots of rubber o-rings in the heater and engine coolant paths. The dealer probably replaces it out of concern for a 'call back' due to a worn belt after doing the thermostat. It is to his, and your, interest not to have to do the belt job a second time if the original was worn and he didn't see it.

Koenig1

OR.... most mechanics get a percentage on what new parts they can add to the bill....! & that, unfortunately, is the most probable explanation!