When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Hi, I daily my 2017C63 sedan, 30 000kms/ year, car is my DD. Where I live is easy do 200kmh+ on highway.. Today was very hot day, around 35°C (95F) and I was going with one 911 on highway, 160-170mph, for 20minutes (empty highway, no speed limit), car was beahaving normally, oil temp around 210F. Then I cooled down, stopped, and left a car for 2 hrs.. After that I got CEL on highway.
Used my OBD tool to read codes - P0108 and P2A0D, wasnt able to erase them with OBD tool but was able to clear them with Mygenius OBD which came with the tune.
Question is, was it caused basically because conditions was hard and I was pushing the car too much or is some sensor probably not working correctly? I did some research and there were few users with tuned M177 and these issues were intercooler sensor related.
Thanks
Last edited by notabenex; Aug 9, 2020 at 03:42 PM.
Used my OBD tool to read codes - P0108 and P2A0D, wasnt able to erase them with OBD tool but was able to clear them with Mygenius OBD which came with the tune.
Not familiar with what those two codes are exactly...can you share the details?
My M177 is tuned and I am at 21k miles so I'm interested in what you find out.
Hi, I daily my 2017C63 sedan, 30 000kms/ year, car is my DD. Where I live is easy do 200kmh+ on highway.. Today was very hot day, around 35°C (95F) and I was going with one 911 on highway, 160-170mph, for 20minutes (empty highway, no speed limit), car was beahaving normally, oil temp around 210F. Then I cooled down, stopped, and left a car for 2 hrs.. After that I got CEL on highway.
Used my OBD tool to read codes - P0108 and P2A0D, wasnt able to erase them with OBD tool but was able to clear them with Mygenius OBD which came with the tune.
Question is, was it caused basically because conditions was hard and I was pushing the car too much or is some sensor probably not working correctly? I did some research and there were few users with tuned M177 and these issues were intercooler sensor related.
Thanks
Those codes are for overboost caused by the pressure sensor(s) on the intercoolers going bad. I had the same exact codes. They are actually soft codes that only trigger the CEL after multiple times of the car picking up on the overboost.
I would get them after running my car hard multiple times in a row in hot conditions (90F+). It'd also only throw the codes with the ECU flash tune and would not do it when on the stock tune. Had maybe 30K miles on the tune (40K on the car) when I started getting the codes. Absolutely no codes after the pressure sensors were replaced (stock or tuned).
Hi, I daily my 2017C63 sedan, 30 000kms/ year, car is my DD. Where I live is easy do 200kmh+ on highway.. Today was very hot day, around 35°C (95F) and I was going with one 911 on highway, 160-170mph, for 20minutes (empty highway, no speed limit), car was beahaving normally, oil temp around 210F. Then I cooled down, stopped, and left a car for 2 hrs.. After that I got CEL on highway.
Used my OBD tool to read codes - P0108 and P2A0D, wasnt able to erase them with OBD tool but was able to clear them with Mygenius OBD which came with the tune.
Question is, was it caused basically because conditions was hard and I was pushing the car too much or is some sensor probably not working correctly? I did some research and there were few users with tuned M177 and these issues were intercooler sensor related.
Thanks
Dealing with a similar issue. Same codes thrown. May I ask who your tuner is?
Those codes are for overboost caused by the pressure sensor(s) on the intercoolers going bad. I had the same exact codes. They are actually soft codes that only trigger the CEL after multiple times of the car picking up on the overboost.
I would get them after running my car hard multiple times in a row in hot conditions (90F+). It'd also only throw the codes with the ECU flash tune and would not do it when on the stock tune. Had maybe 30K miles on the tune (40K on the car) when I started getting the codes. Absolutely no codes after the pressure sensors were replaced (stock or tuned).
My car is at 30k miles and Mercedes has had it for 10 days... Not listening to me to check the f’ing pressure sensors. Gonna stop in and blow a gasket. At least this service will be free af.
Those codes are for overboost caused by the pressure sensor(s) on the intercoolers going bad. I had the same exact codes. They are actually soft codes that only trigger the CEL after multiple times of the car picking up on the overboost.
I would get them after running my car hard multiple times in a row in hot conditions (90F+). It'd also only throw the codes with the ECU flash tune and would not do it when on the stock tune. Had maybe 30K miles on the tune (40K on the car) when I started getting the codes. Absolutely no codes after the pressure sensors were replaced (stock or tuned).
Thanks for reply.
Dont you have more info where to look for the IC sensors, or part number?
Correct me if I'm wrong but the p0108 alludes to map sensors, doesn't it? The other code (p2a0d) is over boost and would likely be boost pressure sensor? I've had just the p0108 code come up twice in the last month and from what I've read on here I should be replacing the four map sensors, which are the ones around the intercooler? If they aren't too hard to get at I just want to replace them and avoid the dealership all together, although I am still under warranty (but stage 2).
Dont you have more info where to look for the IC sensors, or part number?
I'll see if I can find the receipt from when I had this fixed by the dealership.
I do know they were the sensors on the actual intercoolers down by the front of the engine behind all the cooling and intake parts. It wasn't something you could change on your own as they had to basically take the entire front of the car off to access the sensors. Bumper, radiator, cooling reservoir, etc all had to be removed. All I know is the head tech told me, "I hate working on these sh** engines." Fun stuff.
Correct me if I'm wrong but the p0108 alludes to map sensors, doesn't it? The other code (p2a0d) is over boost and would likely be boost pressure sensor? I've had just the p0108 code come up twice in the last month and from what I've read on here I should be replacing the four map sensors, which are the ones around the intercooler? If they aren't too hard to get at I just want to replace them and avoid the dealership all together, although I am still under warranty (but stage 2).
See my reply above. This isn't a job you want to try on your own. Too much in the way that has to be removed to gain access.
Previously I could only find this one diagram that is floating around this site showing 4 maps sensors, so I assumed there was two boost pressure sensors as well, but I just found a diagram off a website for a piggy back tune that shows better (both below). It appears like in the location you're talking about there is 2 of each sensor. The odd thing is, looking and these two different sets of instructions, none of the four locations appear to be that hard to get at. Certainly doesn't seem like the bumper and radiator need to come out, but I could be very wrong.
I just wonder if I'm ONLY getting the p0108 code, should I just go ahead and get just the map sensors replaced. I think before I cleared the code the reader even showed it as being map sensor number 2.
Instructions for two different piggy backs (just because they show those same locations for their particular install):
I can't find the receipt from when they serviced my car for this issue, but I'm 99% sure that the sensors they changed were those shown in the above link listed as part #9 on the first diagram.
I know to access these, he had to at a minimum remove the central reservoir for the low temp cooling system (the one in the middle in front of the turbos) because he accidentally broke part of it during removal and had to have it replaced. He said he followed the instructions from MB to follow the service, so at the very least this is what they recommend to perform the service.
Got the exact same two codes with Velos tune for the first time, for 3 weeks ago, after driven it hard for a first time in long time.
I cleared the codes and now will see if it happens again to take it serious. Problem is that it scares you from driving it hard now, since its pretty scary getting cel codes and thinking the car will break down.
I really hope its nothing serious but I will def go stock if it happens again.
Previously I could only find this one diagram that is floating around this site showing 4 maps sensors, so I assumed there was two boost pressure sensors as well, but I just found a diagram off a website for a piggy back tune that shows better (both below). It appears like in the location you're talking about there is 2 of each sensor. The odd thing is, looking and these two different sets of instructions, none of the four locations appear to be that hard to get at. Certainly doesn't seem like the bumper and radiator need to come out, but I could be very wrong.
I just wonder if I'm ONLY getting the p0108 code, should I just go ahead and get just the map sensors replaced. I think before I cleared the code the reader even showed it as being map sensor number 2.
Instructions for two different piggy backs (just because they show those same locations for their particular install):
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
