Chris Dixon
Member
Hi
In case it helps anyone with a similar problem the following may be of interest. I have a '94 SL500 which when hot (weather that is) would sometimes idle roughly (worse in neutral funnily enough) and be difficult to restart. I had it looked at by a couple of "specialists", the first couldn't reproduce the problem and the second diagnosed the familiar distributor caps/rotors issue. Whilst sceptical of this as the service history shows replacements fitted not that long ago, I duly coughed up £300 for a new set.
Whilst on holiday in Belgium during the 38C peak of the heatwave the problem recurred, but this time the engine would die completely. I managed to restart it the first few times but it gave up the ghost completely.
Recovered to a (very helpful) local Merc dealer, they ran diagnostics which detected an open circuit somewhere in the underbonnet wiring, which they fixed for £80. I never found out where exactly the fault lay but the car hasnn't missed a beat since. Incidentally on a previous long hot run back from Le Mans the ASR light had come on putting the throttle in limp home mode until restarted but this has never recurred.
Regards
Chris
In case it helps anyone with a similar problem the following may be of interest. I have a '94 SL500 which when hot (weather that is) would sometimes idle roughly (worse in neutral funnily enough) and be difficult to restart. I had it looked at by a couple of "specialists", the first couldn't reproduce the problem and the second diagnosed the familiar distributor caps/rotors issue. Whilst sceptical of this as the service history shows replacements fitted not that long ago, I duly coughed up £300 for a new set.
Whilst on holiday in Belgium during the 38C peak of the heatwave the problem recurred, but this time the engine would die completely. I managed to restart it the first few times but it gave up the ghost completely.
Recovered to a (very helpful) local Merc dealer, they ran diagnostics which detected an open circuit somewhere in the underbonnet wiring, which they fixed for £80. I never found out where exactly the fault lay but the car hasnn't missed a beat since. Incidentally on a previous long hot run back from Le Mans the ASR light had come on putting the throttle in limp home mode until restarted but this has never recurred.
Regards
Chris
