This thread should help reduce clutter and allow for a more comprehensive list of DIY procedures and other FAQ. Feel free to post to this thread, but please keep content limited to links to common procedures or FAQ related items-- Hopefully this is something that will grow and be useful to veterans and newbies alike

W210 Wheel Specs (Non-AMG/Sport)
Bolt Pattern: 5x112 (12mm)
Offset Range: 30 to 40
Wheel Size Range: 16x6.0 to 20x8.5
OEM Tire Size (Front): 215/55-16 (215x642 mm)

Spring Pad Part Numbers (front):
210 321 01 84 5mm
210 321 02 84 9mm
210 321 03 84 13mm
210 321 04 84 17mm
210 321 05 85 21mm
Spring Pad Part Numbers (Rear):
Rear
210 325 01 84 5mm
210 325 02 84 9mm
210 325 03 84 13mm
210 325 04 84 17mm
You can check the pad number by feeling the bumps on the pad itself
http://waltermitty.net/mb/spring%20pads.jpg

Battery Disconnect/ Resynchronizing Harb
http://www.pointedthree.com/disc/forums/showthread.php?tid=744&posts=1&start=1

Headlight removal (prefacelift)
http://www.pointedthree.com/disc/forums/showthread.php?tid=745&posts=1#M7616

Installation of CPS Sensor (w/ Pictures) earthwonder
http://www.pointedthree.com/disc/forums/showthread.php?tid=746

Window Regulator Replacement (w/ Pictures) Ashman78
http://www.benzworld.org/forums/w210-e-class/1226700-diy-pictorial-window-regulator-replacement.html?highlight=Window+regulator

Battery Maintenance Spine911, Sosh, mjhawkins2346, Solokoff
http://www.pointedthree.com/disc/forums/showthread.php?tid=751&posts=1#M7648

Light Malfunctioning Warning mjhawkins2346
http://www.pointedthree.com/disc/forums/showthread.php?tid=749

A/C Fan Speed Regulator (2000 E320 w/ pictures) Franasia, AlanMcR
http://www.pointedthree.com/disc/forums/showthread.php?tid=752
&
http://www.pointedthree.com/disc/forums/showthread.php?tid=672&posts=3&start=1

Spark Plug Replacement DIY McGary911
http://www.pointedthree.com/disc/forums/showthread.php?tid=753&posts=1#M7651

iPOD Integration W210 (Prefacelift)
http://bipesauto.com/ (click on Bipes iPod/Portable MP3 Adapter link)

Brake Switch Replacement (ABS/ETS warning light) A1EK
http://www.pointedthree.com/disc/forums/showthread.php?tid=754

Spring Top Mount FAQ's Black Stallion & Guest
http://www.benzworld.org/forums/w210-e-class/1221028-spring-top-mount-failure.html?highlight=spring+mount
&
http://www.benzworld.org/forums/w210-e-class/406500-recall-notice-w210-front-spring-towers.html?highlight=spring+mount

Oil Change (w/ Pictures) gregs210, Olivengco
http://www.benzworld.org/forums/w210-e-class/1217599-diy-pictorial-oil-change.html
& FAQ
http://www.benzworld.org/forums/w210-e-class/1249853-ok-use-ramps-raise-e320-recommendations-2.html?highlight=pictorial

Motor/ Engine Mounts (2001 E320) texas-patrick
http://www.pointedthree.com/disc/forums/showthread.php?tid=750&posts=1&start=1

Harmonic Balancer Recall Notice (All MBs built between 1998-2001)
http://www.pointedthree.com/disc/forums/showthread.php?tid=882&posts=1#M9191

Everything about the W210 Mr. Pie & Ed soto
http://www.pointedthree.com/disc/forums/showthread.php?tid=2006&posts=2&start=1

Brake Fluid Power Bleed (98 E320 W/Pictures) G-AMG
http://www.pointedthree.com/disc/forums/showthread.php?tid=6489&posts=1&start=1

Fuel Filter Change (M112 & M113 W/pictures) G-AMG
http://www.pointedthree.com/disc/forums/showthread.php?tid=5163&posts=3&start=1
Follow up to Fuel Filter Change (M112 & M113 W/pictures) G-AMG
http://www.pointedthree.com/disc/forums/showthread.php?tid=8804&posts=1&start=1

Spark Plug Change (M112 & M113 engines W/pictures) G-AMG
http://www.pointedthree.com/disc/forums/showthread.php?tid=5247&posts=2#M67252

Steering Wheel Removal (W210 W/pictures) G-AMG
http://www.pointedthree.com/disc/forums/showthread.php?tid=5198&posts=10#M75333

V-Belt Tensioning Pully Replacement (W210 W/pictures) G-AMG
http://www.pointedthree.com/disc/forums/showthread.php?tid=7419&posts=2#M75338 
(Update: Corrected method of turning the "Updated" version of the Belt Tensioner)
http://www.pointedthree.com/disc/forums/showthread.php?tid=7517&posts=24&start=1

722.6X Transmission Fluid Change (w/pictures) G-AMG
http://www.pointedthree.com/disc/forums/showthread.php?tid=8622&posts=1&start=1

Wheel bearing Free Play Evaluation (w/pictures) G-AMG
http://www.pointedthree.com/disc/forums/showthread.php?tid=8803&posts=1&start=1

Swaybar Bushing and Link Replacement (w/pictures) G-AMG
http://www.pointedthree.com/disc/forums/showthread.php?tid=9616&posts=2&start=1

A/C Condensor Replacement (w/pictures) G-AMG
http://www.pointedthree.com/disc/forums/showthread.php?tid=9636&posts=2&start=1

Headlamp Lens "Rejuvination" (w/Pictures) G-AMG
http://www.pointedthree.com/disc/forums/showthread.php?tid=11213&posts=3#M114648

Shifter Bushing Replacement (W/Pictures) G-AMG
http://www.pointedthree.com/disc/forums/showthread.php?tid=13412&posts=2&start=1

Coolant Service (W/Pictures) G-AMG
http://www.pointedthree.com/disc/forums/showthread.php?tid=14440&posts=1&start=1

Flex discs replacement (W/picture) EdMclass
http://www.pointedthree.com/disc/forums/showthread.php?tid=14046&posts=4&start=1

722.6 Conductor Plate and Pressure Regulator Spring (W/pictures) G-AMG
http://www.pointedthree.com/disc/forums/showthread.php?tid=15290&posts=7&start=1