My wife just informed me that her clock is currently 4+ hours slow and while driving, she can see the battery-charge warning light glowing dimly.
The battery is probably 4 years old or less, so this is my first choice. I have not had a chance to get a volt meter on it yet, but I will in a few hours.
The alternator should be fine, but you never know...
Anyone wish to place odds on the battery?
76 240D (W115) - 550K miles
78 300D (W123) - 200K+ miles