Tires 295/40R21




My new to me GLS 550.
I purchased this to replace my ML350. It's going to be a business/commuter car primarily and the air ride has already proven to be a massive improvement over the ML. It's a 2017 with 23k miles. The paint is nearly flawless and the interior looks (and remarkably, smells!) new. I'll post better pictures after I wash it (took delivery in the rain) but wanted to ask a few questions first, including one pertaining to the photo above:
-Both headlamp assemblies have a minor amount of condensation behind the lenses. This has happened to my ML350 before. My garage is heated, insulated and I have a dehumidifier in there (ambient humidity is hovering around 30% so pretty dry) and I'm hoping the fan will force a small amount of hot, dry air into the assembly to clear it up. That said, any way to prevent this from happening in the future?
-Are there spacer kits for the air springs? I'd like to fit slightly more aggressive, slightly taller tires. Probably can't go more than 1" taller at stock ride height, and seeing as the vehicle automatically lowers at speed I'd need the additional clearance.
-I've read about android HU's to replace the stock unit. 7" is a bit small and there are 9" units that add features, have a higher resolution (and touch) screen, are brighter and generally are a QOL upgrade vs the standard HU. Does anyone have recommendations for the best unit? Any installation advice would be much appreciated too!
-I took delivery last night. Both driver and passenger seats had functional multi-counter and massage features. This morning, both seats have lost bolster adjustability and massage function. The motors are operative when I activate the features which makes me think a hose has become loose (which happened with the driver seat in my G550). Strange that both failed simultaneously. Any suggestions?
Thanks!
My new to me GLS 550.
I purchased this to replace my ML350. It's going to be a business/commuter car primarily and the air ride has already proven to be a massive improvement over the ML. It's a 2017 with 23k miles. The paint is nearly flawless and the interior looks (and remarkably, smells!) new. I'll post better pictures after I wash it (took delivery in the rain) but wanted to ask a few questions first, including one pertaining to the photo above:
-Both headlamp assemblies have a minor amount of condensation behind the lenses. This has happened to my ML350 before. My garage is heated, insulated and I have a dehumidifier in there (ambient humidity is hovering around 30% so pretty dry) and I'm hoping the fan will force a small amount of hot, dry air into the assembly to clear it up. That said, any way to prevent this from happening in the future?
-Are there spacer kits for the air springs? I'd like to fit slightly more aggressive, slightly taller tires. Probably can't go more than 1" taller at stock ride height, and seeing as the vehicle automatically lowers at speed I'd need the additional clearance.
-I've read about android HU's to replace the stock unit. 7" is a bit small and there are 9" units that add features, have a higher resolution (and touch) screen, are brighter and generally are a QOL upgrade vs the standard HU. Does anyone have recommendations for the best unit? Any installation advice would be much appreciated too!
-I took delivery last night. Both driver and passenger seats had functional multi-counter and massage features. This morning, both seats have lost bolster adjustability and massage function. The motors are operative when I activate the features which makes me think a hose has become loose (which happened with the driver seat in my G550). Strange that both failed simultaneously. Any suggestions?
Thanks!






