We had a rewarding phone call today from a young man traveling in his newly acquired 1985 Mercedes 300SD and his transmission would not shift above third gear. This client was near San Francisco, heading to Portland. Quickly the crew at MBI Motors thought of possible causes. Corbin suggested a possible floor mat interaction, jamming the kick down switch under the gas pedal. Our Client reported that yes in fact that was the case, & it was shifting fine now. This made all involved very happy !