I'm considering trading in my c300 for an 2008 GL550 LOADED in Black on Black

I Got a few mods on my mind i'm gonna put on it:

1.O.Z Canyon ST 20x9.5 Wheels (I Will be going on skiing trips so i need A/S tires)

2.The best exhaust system i can find for it (who makes one?)

3.Suspension adjusment module (for better control over settings)

4.ECU Engine remap ECU Tuning

5.BMC Drop in Air Filters

6.Matching foglight bulbs.

7.Valentine V1 Radar detector

So guys all i need help on is finding an ECU Chip tunin and Suspension adjustment and Exhaust system and last question si whats the max size i can run on 20x9.5 tires and GL? 295/50/20 or 285/55/20 will be too big no?

 

Can i fit 305/45/22 tires on 22x10 O.Z Canyon rims under the GL550?

 

Go to a site like Tire Rack and pick a tire with a revolutions per mile of 685 and you will maintain correct speedometer reading.

 

I am getting 20" OZ's put on my GL550 with a set of Blizzaks (?) Snow. They should be in tomorrow. I didn't think they made the proper wheels but the place where I took my car called Tirerack and they said these should work just fine. They shipped a sample wheel and we mounted it on the car and it looked great. They said the specs were fine but I don't remember what they were. When I get the info in the next couple of days I will post, with pics.

 

305/35/22 will fit on the 22X10 rim without rubbing and are within the range of factory overall diam.

305/40/22 are slightly taller than oem tires, but can be had for less $.

good luck.

 

Most tires in this size will yield about a 4% speedo error.