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Discussion Starter #21
I'm really enjoying the new tires but now my tire pressure warning has come on saying all 4 tires need air. I know that the OEM run flats require much hire pressure than the new tires I have. How do I re calibrate the TPMS for the correct pressure in the new tires?
 

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i believe in the tire pressure menu you can click okay again and it will ask to use current values and you click yes and it should use that psi .
 

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Yeah typically 36/32 ... then once set and read by the system, just reset those as reference values (as noted in the previous post per pa4ul)
 

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I am not a fan of run-flats at all. Since I live in the Northern U.S. I always default to All-Season tires. I switched out to Pirelli Cinturato P7 A/S Plus - 225/45R17/XL 94H tires and have been very pleased with the handling, fuel economy, performance and the ride isn't bad either. I now travel with a plug-in compressor & tire goop kit for emergencies. I picked up a screw 5 months ago in one of them but was able to get to a Town Fair tire shop without having to use the goop. They use an inside patch with a plug that works great and all for $ 5.95. Two weeks ago my wife's GLC300 picked up a screw same scenario, also worked out great. Last week my Tacoma's Michelin (less than 11,000 miles on the vehicle) was punctured by a sharp piece of shale from road construction and I was 500 yards from the local Town Fair Tire. I guess a lucky break. That's 3 flats in 5 months - two in the last two weeks. In the 50 years I've been driving I've only had 3 flat tires before this rash of them. What gives?
 

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I run my tires at : 40 psi front, 35 psi rear. (factory recommended settings found on the fuel filler flap says 38 F, 33 R)..
 

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(factory recommended settings found on the fuel filler flap says 38 F, 33 R)..
Mine notes 36/32 for normal driving (and the long and even tread life supports that)
Wonder why they have so many variants of that tire pressure sticker for the fuel door?

“Hans! Vake very sure you put zee difvervent stickers on all zee karz!”

Good grief
 

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Mine notes 36/32 for normal driving (and the long and even tread life supports that)
Wonder why they have so many variants of that tire pressure sticker for the fuel door?

“Hans! Vake very sure you put zee difvervent stickers on all zee karz!”

Good grief
Probably they set those specs based on where the car is being sold. Climatic conditions ? Don't think they will set the front tires at 38psi in Arizona. =)
 

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Dont think so ... the euro delivery tech q&a noted labeled pressures applicable to de and us
Also informed me factory set at 39/39 only for delivery purposes (initialize sensors leak check etc) and once off delivery site i could update to my choice
Same session also noted (back then anyway) rear spoilers prepped painted & attached only when at us vpc ... which was kinda weird and was some admin rule
 

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Discussion Starter #34
I'm using 36 all around and the grip is excellent and the ride is a huge improvement over the run flats. Should I switch to 38/33?
 

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I'm using 36 all around and the grip is excellent and the ride is a huge improvement over the run flats. Should I switch to 38/33?
If 36 all round works for you in terms of ride quality and handling, then stick with it.

I find the factory asymmetrical setting of 38psi front and 33 psi rear works for me. It makes sense to me too, since the CLA is not a 50/50 weighted car, the front being heavier than the rear, having a higher front tire pressure to offset the heavier front end. I think it will also help with tire wear uniformity.
 
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