Hi A sorry story. I owned 2 SWB S Classes from 2009-2016 running with normal tyres - and no problems ever with the alloy wheels. I purchased a LWB S Class in 2016, and regrettably fitted run flat tyres (Goodyears) in October 17 -rear and February 18 - front. In June 18 I noticed handling problems and had the car inspected. One cracked alloy wheel at the rear and two out of shape alloys at the front. All three beyond repair. The Goodyears at the front had noticeable bulges in the sidewalls. All thanks to bumps and potholes in the roads. Each alloy costs £1,000 to replace and the Goodyears a write-off after 3 months at £230 per tyre. An expensive mistake! Talking discretely to a MB technician - he advised me never to fit run flat tyres to an S Class - particularly with the weight of the LWB. Has anyone else experienced the same problem?