SL-Class (R231) 2013 on: Discussion on the SL550

SL/R231: Last Visit Under Warranty/Issues?

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Old Apr 2, 2022 | 11:37 AM
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Last Visit Under Warranty/Issues?

I'll be taking my SL to my dealer next month for its last visit under warranty. Making a list of possible issues.

So far I have the subframe corrosion issue, cam sensor leaks, timing cover leak. Both engine and transmission mounts have been replaced under warranty already.

Any other items I should mention? Thanks.
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Old Apr 2, 2022 | 10:04 PM
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Engine and tranny mounts? How many miles are on your car?

Check for hydraulic fluid leaks in the trunk. Have you operated your top yet this year?
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Old Apr 2, 2022 | 10:12 PM
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31k miles. Put the top down when I installed the new auxiliary battery.
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Old Apr 2, 2022 | 10:53 PM
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Originally Posted by rmorin49
31k miles.
That seems like low mileage to replace the engine and transmission mounts. I had to replace the mounts on my 2004 SL500 last year, but it had over 100,000 miles and was 17 yers old. How did you determine the mounts were bad? Did the car just feel weird one day when you pull away from a traffic light?

Originally Posted by rmorin49
Put the top down when I installed the new auxiliary battery.
Darn! Forgot to do that when I replaced mine. Woulda made it easier.
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Old Apr 2, 2022 | 11:16 PM
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Originally Posted by JettaRed
That seems like low mileage to replace the engine and transmission mounts. I had to replace the mounts on my 2004 SL500 last year, but it had over 100,000 miles and was 17 yers old. How did you determine the mounts were bad? Did the car just feel weird one day when you pull away from a traffic light?


Darn! Forgot to do that when I replaced mine. Woulda made it easier.
I had a vibration wen idling in Drive. First they replaced the transmission mount, I guess there is only one. Vibration was reduced but still there. Replaced the motor mounts, I guess there are two. Vibration gone.
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Old Apr 3, 2022 | 12:35 AM
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That's correct. One tranny mount and two engine mounts. I'm just surprised they failed so early.
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Old Apr 3, 2022 | 09:19 AM
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How about compression check and borescope looking for cylinder scoring? Assuming you have the M278 V8. Might need to pay a Dx charge but cheaper than a new engine.
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Old Apr 3, 2022 | 11:59 AM
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Originally Posted by chassis
How about compression check and borescope looking for cylinder scoring? Assuming you have the M278 V8. Might need to pay a Dx charge but cheaper than a new engine.
Nope. He has an SL400 with the M276 V6. Unlikely the dealer will do that without charging a month's worth of labor.
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Old Apr 3, 2022 | 12:39 PM
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Originally Posted by JettaRed
Nope. He has an SL400 with the M276 V6. Unlikely the dealer will do that without charging a month's worth of labor.
Good thing OP has the M276, that is a proven reliable engine.
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Old Apr 3, 2022 | 04:01 PM
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Originally Posted by W205C43PFL
Good thing OP has the M276, that is a proven reliable engine.
Thanks, the profile info with car model details is not visible in the mobile version of this site. Now I see it, yes the M276 is reliable.
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Old Apr 3, 2022 | 07:45 PM
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Originally Posted by chassis
Thanks, the profile info with car model details is not visible in the mobile version of this site. Now I see it, yes the M276 is reliable.
Yup, just as reliable as yours
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Old Apr 4, 2022 | 09:28 AM
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Hi Chassis,

Please advise where to find "profile info with car model details" per your post #10 above

Tx
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