Can't help with the alarm, mine was ripped out by a PO. It's wired into almost everything in the car, a real PITA when it won't work correctly.

When replacing fuses, use the copper/brass kind rather than aluminum. Not much difference in price and a lot better conductor, especially as they age.

__________________

"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970