SL/R231: 2013-2020 SL Reliability issues: CRICKETS!
Enjoy!
Reid C




Reid C
1. Struts on the trunk gave up. replaced them myself with parts and tools from Amazon
2. The pnuematic reservoir that holds air for the seats etc. blew. I think there was probably moisture in the lines that froze on a very cold morning. Indie replacement wasn't expensive.
3. A pillar trim pieces following windshield replacement. This was probably the most expensive reapir. Safelite replaced the windshield twice and left me with buzzing. Dealing with them was a nightmare and when they started mumbling about 'clips' I gave up. I took the car to a major MBZ/Audi/Porsche dealer with a glass tech on site. They diagnosed the problem as A pillar trim pieces and said I need new ones. When they came in from MBZ, the color didn't match, so they sent them out to a local paint shop. The fix is good and I will never go to Safelite again!
4. Cracked rim - difficult to find a replacement and expensive. If it happens again I will replace the OEM wheels with some of those nice turbines.
Gary
Last edited by NiceMerc; Jul 9, 2024 at 06:05 PM.
SL/R231 Exterior A-Pillar Trim - MBWorld.org Forums
Last edited by JettaRed; Jul 10, 2024 at 08:22 AM.
Here is my question though... I do not have the air suspension or magic roof but otherwise it has everything. Should I be afraid to take this car on long trips (3-7 hours)? Currently I am worried I will be afraid to drive it as it is unreliable in my head. Can someone convince me that it was bad luck and with only 40k miles I really should have a few years of mostly trouble free driving other than maintenance (3-4 k miles per year ).
Apologies for the long first post! I just have such mixed feelings. It is a dream car I bought cash and now fear I made a huge mistake. It is less the financial aspect than the fear of getting stranded.
Thanks!!!
The Best of Mercedes & AMG




The Vario roof would not go up. It was stuck open telling me I need to reduce speed. I am in park while doing this. also tried with car off and in Acc mode. Same message.
Sounds like the car may need a battery. These cars put quite a load on the electrical system and batteries need to be replaced fairly regularly. The cars can act unpredictably (like what you described) when the batteries get weak I bet the car sat for a while and is probably due for both batteries to be replaced. timing is about right if they are original batteries…
see this thread
https://mbworld.org/forums/sl-class-...ent-guide.html
Good Luck!
Last edited by crconsulting; Aug 26, 2024 at 12:10 AM.
I will update again if I get more info after the repairs are done and there is more to add.
For others who missed my long earlier post... TLDR. ABS,ESC, ESC off lights came on. A few minutes later the check engine light. Running and driving normally. Vario top will not close as it is stuck fully open and saying to reduce speed. Cause: faulty accessory battery and wheel speed sensor. 2017 R231 40k miles.
M278 and M157 used across the MB product lineup have a host of well-known serious issues with higher mileage.
The widely-used M276 in the SL450 is a solid engine.
Because of low production volume and low annual mileage it’s premature to say anything about the movable roof system.
what’s involved with diagnosing this ?






