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That's what my MB Service Writer politely asked me to never do again.

My driver side heated seat stopped working this week. (seat back still heated) This is the same seat heating eliment replaced last year. Some of you may remember it got so hot it burned a hole through the leather and burned my ass on the way to the gym. Yeowch!

I mentioned to the service writer that, while "I was kneeling on the seat cleaning the rear window, I heard a pop". In my auto-repair ignorance I suggested that maybe I disconnected a wiring harness when I kneeled on the seat. (I'm a medium frame guy at 168lbs) He smiled and stated that the same thing has happened to him 2x. But the resulting pop was not a wiring harness. It is most likely an actual puncture/rupture of the heating web. He described to me the "MB suggested & preferred method" for cleaning the R171 rear window. "Sit Side Saddle while reaching back to clean the window." How silly! I joked by stating, "That might work if I was a Cirque du Soleil entertainer. But I don't remember reading about that method in the owners manual or any warning about not kneeling on the seat." He responded by saying not to worry, they would replace it no charge. Whew! Dodged another out of warrantee repair.

Not sure if anyone else has had this happen, but thought I would share the experience.

Drive Fast (without Kneeling on the Seat!) R)
 

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That's what my MB Service Writer politely asked me to never do again.

My driver side heated seat stopped working this week. (seat back still heated) This is the same seat heating eliment replaced last year. Some of you may remember it got so hot it burned a hole through the leather and burned my ass on the way to the gym. Yeowch!

I mentioned to the service writer that, while "I was kneeling on the seat cleaning the rear window, I heard a pop". In my auto-repair ignorance I suggested that maybe I disconnected a wiring harness when I kneeled on the seat. (I'm a medium frame guy at 168lbs) He smiled and stated that the same thing has happened to him 2x. But the resulting pop was not a wiring harness. It is most likely an actual puncture/rupture of the heating web. He described to me the "MB suggested & preferred method" for cleaning the R171 rear window. "Sit Side Saddle while reaching back to clean the window." How silly! I joked by stating, "That might work if I was a Cirque du Soleil entertainer. But I don't remember reading about that method in the owners manual or any warning about not kneeling on the seat." He responded by saying not to worry, they would replace it no charge. Whew! Dodged another out of warrantee repair.

Not sure if anyone else has had this happen, but thought I would share the experience.

Drive Fast (without Kneeling on the Seat!) R)
mmh!

I too nealt on mine and I too heard a pop. My seat never seems toget as hot as my other one but it does get warm. Could it be broken as well, ie, a partial break or if it was broken it would break altogether?
 

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Discussion Starter #3
Great question! I think that's a question for "Super"DanSLK or the techs at MB. Any thoughts Dan?

bobbyM R)
 

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Yep, a good one for DanSLK! Your service rep's explanation makes sense. His solution does not! I have read that some SLK owners clean the inside of their rear window with the top partially opened so as to give them access to the sides of that window while they stand outside the car. Anybody try this?
 

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Thanks for that warning. I kneeled on my seat (probably when cleaning the windows) when I first got it and immediately heard a sound like a pop. I had no idea what it was but I made a mental note to never do that again.

The heated seat still seems to work fine.
 

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Discussion Starter #6
Yep, a good one for DanSLK! Your service rep's explanation makes sense. His solution does not! I have read that some SLK owners clean the inside of their rear window with the top partially opened so as to give them access to the sides of that window while they stand outside the car. Anybody try this?

I completely agree DoleB that his solution was out there. I got the feeling he was just selling me a line of BS. I just politely listened since he agreed to pick up the repair under a slightly over the mileage warrantee.

Drive Fast!

bobbyM :)
 
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Depends where you put your knees i guess, takes a lot of force to damage a carbon heating pad.

We have guys/gals that sit like that all the time to clean the rear screen's and we don't have constant problems, i know your ass tends to absorb and distribute weight better than a kneecap but just sitting backward in a seat should not be a guaranteed way to damage the seat heater, bearing in mind of course the SLK's seat is designed to hold a baby seat that focuses all of its weight on an even smaller area.
 

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crap. My seat drivers side heated seat isn't working either.

This must have happened when i installed the wind restrictor.

ah crap. Thats a piss off.
 

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I just noticed the seat bottom heaters are no longer working on my SLK55 (driver or pax side). I just had my windows tinted... I imagine that the installation caused the point load (installers knee) to damage the elements. Good thing I have one more month of factory warranty left :rb
 

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crap. My seat drivers side heated seat isn't working either.

This must have happened when i installed the wind restrictor.

ah crap. Thats a piss off.
When it breaks, does just the bottom break or the whole seat? It's getting cool at night here so I fired up the seat heater for the first time last night and back was nice and toasty, but bottom didn't seem to be.
 

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Discussion Starter #12
When it breaks, does just the bottom break or the whole seat? It's getting cool at night here so I fired up the seat heater for the first time last night and back was nice and toasty, but bottom didn't seem to be.

Hi Brian

From my loss of heated seat experience the heat membranes are two separate, independent heat surfaces. The bottom is one membrane and the back is another. When I lost the heat in my seat due to puncture and the other time due to malfunction, the back still heated but the bottom did not. Hope that helps and I'm sure Dan will provide the techy version.

Drive Fast! R)

bobbyM
 

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Brian_74,

When mine broke the dealer told me it was only the bottom element that was damaged, but because they were conected neither would work. Mine would turn them selves off less than a second after I turned them on.
 

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When it breaks, does just the bottom break or the whole seat? It's getting cool at night here so I fired up the seat heater for the first time last night and back was nice and toasty, but bottom didn't seem to be.
Yep, it's down right cold, getting down to the low 60's :rb

Just kidding you :biglaugh: I lived in Tucson from 1979 until 1991. My family still lives there. Best place in the world for a drop top! Braved wearing my U of A garb on Saturday... What the heck happened with the game??

Anyway, I brought my car in for an "A" service today and they had to order lower heater assy's for both seats. Will be many weeks :td: Oh well, the car has been dispatched to garage duty. It actually is getting cold here (day and night) :bannana: Time for the truck.
 

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How do you know if your bottom seat heat pads are broken? I tested both sides today (driver / passenger) and the back's were nice and warm (almost toasty). However, i felt the bottom's took approximately 5mins and weren't as hot as the back's, but were warm.

Another observation: i left both heat seats ON and didn't sit on them. After 5min's, i put my hand over to the back and they were both hot/warm, however the bottom's weren't. Only when i sat down (and after 2-3minutes) i felt they were warm. Would you guys say its broken?
 

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I also had the seat base heating pad fail on my previous R171. I definitely knelt on the seat a number of times to clean the window but didn't hear any pop. The seat started getting very hot till I took it to the dealer just out of warranty. The whole bottom of the seat (squab) was replaced at the cost of £900 ($1300) but fortunately the dealer got a goodwill settlement from MB and it cost me about £150. So beware get it fixed within warranty if you can!
 

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dan, not too sure about the baby seat thing.

my sun at 20lbs plus seat at 10 = 30lbs, maybe one sixth of my weight (I wish - closer to a seventh).

I would say my knee is much less than 7 times the area of the base of a car seat but even then you are talking about average pressure across the whole seat being higher for a baby seat.

I don't think it's even close the force exerted over the knee cap area in terms of potential damage to the element.

The most annoying thing is that it is a total nightmare to replace.
 
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