SL/R231: Vibration at low rpm
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SL350
Vibration at low rpm
Over the last few months my 10 year old SL350 has developed an annoying vibration when the car is being driven very slowly or paused at junctions etc. The indeepndent Mercedes servicing garage I use has checked it out and confirmed no body parts are touching and all supports are OK. It seems to be associated with the tickover speed which is 600 rpm. Above that it seems to be fine. Apparently however tickover is set by the ECU so can't be adjusted. It's a low mileage car and I've only ever used Shell VPower. I would appreciate any suggestions.
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From: Brookshire, Texas & Cat Spring, Texas
2019 SL550/2023 EQS 580 SUV
Sounds like the rubber motor and transmission mounts are worn out. I do not know the specifics on your SL but some older designs are hollow rubber filled with fluid. Once they crack and the fluid runs out you can feel the vibration from the motor at idle.
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From: Hagerstown MD
2015 SL400; 2019 X5M40i
Last edited by rmorin49; Jan 2, 2023 at 08:56 PM.
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From: In the minds of others rent free.
SL 400
Do you have aftermarket wheels? If so check the wheel bearings...
Over the last few months my 10 year old SL350 has developed an annoying vibration when the car is being driven very slowly or paused at junctions etc. The indeepndent Mercedes servicing garage I use has checked it out and confirmed no body parts are touching and all supports are OK. It seems to be associated with the tickover speed which is 600 rpm. Above that it seems to be fine. Apparently however tickover is set by the ECU so can't be adjusted. It's a low mileage car and I've only ever used Shell VPower. I would appreciate any suggestions.
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Joined: Jun 2012
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From: In the minds of others rent free.
SL 400
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From: Nor-Cal
2020 GLC300 -2014 Sl550 - 1997 SL600
You say it is vibrating at idle, have you lifted the bonnet and looked at the engine while at idle? Can you see it physically vibrate? Mileage and year?
Last edited by crconsulting; Jan 3, 2023 at 10:19 AM.
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