For information...my local MB shop informed me of a potential hazard. The area in my 560SEL under the master cylinder is a great place to collect leaves and pine needles. Unfortunately, there is a resistor in there which produces heat. The shop had a car similar to mine, having the master cylinder and the surrounding wiring replaced after the leaves caught fire. Luckily for the owner, a trucker saw and stopped, packing a fire extinguisher.
I cleaned that area out on mine using a shop vac with some PVC pipe taped to the end. Worked fine. Also hit the area under the battery.
1971 Cutlass convt. (sold)
1978 Olds Toronado (sold)
the rest are boring