PurpleS500

Congrads on your purchase, im also in works now on getting an e550 coupe with p2 in diamond white but cant locate one with apperance pkg, i really want the adjusting front seats

babyjocko

Isn't there a forum for the C207 E Coupe? Why is this thread here?

SeaMerc

It's an old thread recently revived.

cmcbenz

just for fun..
http://www.youtube.com/watch?v=1jwAQX9ZDTs

E550CNewbie

Hi Guys,
I bought my first mercedes 2 months ago. I don't know much about cars, but I think I got the nicest looking car on the road. Having said that, when I picked up my car, my tires had pressure of 52 psi and looked like balloons, so I went to the dealership and they deflated them a little. The side of my door says front must be 35 and rear 44. Right now, they are 37, 42 on the left and 36, 41 on the right. I just can't seem to be able to make the pressure exactly 35 and 44 because the pressure monitor doesn't display the actual pressure unless I start driving the car. Should I be concerned? According to pirelli's specs, psi is 50 for these tires. I drove the car for 2000 miles with 33, 36 with no problems then I realized it should have been different. I got amg wheels.
Thanks

cmcbenz

i keep mine around 36 in the front and 41 in the back when warm. it's important to consider warm tire pressure versus cold tire pressure. your tire monitor system will update within minutes. you can get a pressure gauge if you can't quite get it right, but one psi won't make a difference. if you have heavy loads you can increase the tire pressure, but follow the specs on the door. i think anything below 33 cold in the front (or 36 warm) and 36 cold in the back (40 warm) is too low, and anything above 38 in the front or 44 in the back is too high.

there are a couple things to think about ... gas mileage and wear patterns. i find i can get one or two points of mpg better when my tires are properly inflated (36/42 when warm). if your tires are wearing too much in the middle of the tread, they are overinflated. if they are wearing too much on the edges, then they are under-inflated.

also, there are considerations of speed and braking. the reason the front tires are lower is to aid in the braking process and handle the weight distribution over the front tires. if your tires are properly inflated, i.e., not under-inflated, you can accelerate better. if your tires are over-inflated, you need more braking distance as there isn't as much friction on the road.

i'm not an expert - but i have had a lot of cars and i have spent a good deal of time thinking through this.

E550CNewbie

Thanks for the info. I live in south florida and it's VERY hot. My tires' pressures after a few minutes of driving were 37 in the front, and 44 and 43 in the rear then they became 44. After a while the left tires became 38 and 45 and the right side 37 and 44. Should I stop obsessing over the tire pressure or should I go to the dealership to fix it? I don't know much about tires. My previous car--BMW 335i--didn't display the actual pressures. It notified me when it was low but without an actual number. This is all new to me.

RJC

The E coupe cab forum is no where's near as active comp'd to this one (tumble weeds) and there are many similarities between the two cars

cmcbenz

Don't stress about one psi of difference. You could just let a little air out of one side.

tgrille

newbie to mb forum