SL/R231: My build sheet questions




I have some down time this morning and was looking over my build sheet again. If anyone has an idea what each item below means I would appreciate it...
M014 ENGINE INCREASED PERFORMANCE.
U28 HD BRAKES. (HD? What are normal brakes?)
485 COMFORT RUNNING GEAR
199 MAYBACH BREATHER CAP ( IS THIS FOR THE TURBOS?)
233 AUTONOMOUS INT. CRUISE CONT. PLUS (DISTRONIC PLUS) I UNDERSTAND DISTRONIC, BUT NOT THE AUTONOMOUS PART.
91U ROOF INTERIOR TRIM, BLACK FOIL?
Thanks in advance...
Last edited by ThatsMyDawg; Jul 28, 2023 at 08:58 AM.




Standard brakes: front-342mm x 32mm vented, 320mm x 24mm unvented rear
Sport package brakes - HD Brakes (U28) : front-360mm x 36mm vented, 320mm x 24mm vented rear
AMG standard brakes: front-390mm x 36mm vented, 360mm x 26mm vented rear
Last edited by crconsulting; Jul 28, 2023 at 10:35 AM.












I use “dark mode”, or whatever mbworld calls it, to browse this forum. Background is all black with white text. I personally think It actually helps to see text better….
Anyways, text must have showed up as white text color on white background for some reason as it’s still in development mode…..
I’ll edit the post….
Good Luck




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All US R231 SL's on springs use option 485 (Comfort Running Gear or Comfort Suspension). Elsewhere, any SL with AMG sport package have code 486 (Sport Suspension) which lowers the car by 10mm.
487 is the ABC suspension.
My assumption is that 91U is just the panorama roof with screen. Our magic sky for example is simply called Glass Vario Roof
The Best of Mercedes & AMG




I do have magic sky as well. "412 GLASS VARIO ROOF" Taken from build sheet. (I have always loved it btw). Gives me a high tech futuristic vibe)
All US R231 SL's on springs use option 485 (Comfort Running Gear or Comfort Suspension). Elsewhere, any SL with AMG sport package have code 486 (Sport Suspension) which lowers the car by 10mm.
487 is the ABC suspension.
My assumption is that 91U is just the panorama roof with screen. Our magic sky for example is simply called Glass Vario Roof
Last edited by ThatsMyDawg; Jul 28, 2023 at 04:25 PM.




Also, the autonomous just relates to the adaptive (braking) aspect... not the steering.




I will have to wait until I get my car back to check what my roof lining is made of. My car is in the shop now getting my front bumper touched up.
Any ideas what they mean by the engine increased performance? Increased over which other variant?
Last edited by ThatsMyDawg; Jul 28, 2023 at 07:52 PM.












Last edited by ThatsMyDawg; Aug 29, 2023 at 08:24 AM.







