Lifetime Premium Member
Date registered: Oct 2002
Vehicle: 1967 250 SL, 1963 220Sb
Location: Los Angeles / Altadena
Mentioned: 3 Post(s)
Quoted: 102 Post(s)
That is very strange. I don't think the starter solenoid CAN send power to the starter if the solenoid isn't engaged, but what do I know.
Three things to consider:
1) is there a way that you can manually turn the engine? Probably not since your car is probably an automatic. But if there is, turning the flywheel a little so that different teeth are at the starter would be useful.
2) If your starter is somehow loose (which is hard to imagine) it would explain this. The starter would be working correctly but no longer connecting to the flywheel.
3) Verify the battery voltage WHILE trying to start the car. If the battery voltage is too low then it might not correctly engage the solenoid. I had a 65 Alfa that wouldn't start with a fully charged battery unless I also jump started the car at the same time. Turns out my battery voltage was low and it needed a new battery.
I can't remember if there is an access panel in the passenger footwell for the top bolt of the starter on a W108. There is on a W111. Make sure you disconnect the battery when trying to remove the starter. It shouldn't be a difficult task. Two big bolts.
Currently: 1967 250 SL, 1963 220Sb, 1965 300SE Lang, 1971 280SE parts car, 1972 Alfa GTV, 1965 Alfa Duetto, 1993 BMW R100R
Past: 1971 250 C, 1985 300 TD, 1967 250 S, 1968 280 S,1981 300 D, 1982 280CE, 3 Facel Vegas, Borgward Isabella Coupe, Alfa 2600 Sprint, Volvo P1900 (yes), numerous less interesting Volvos, ...