What I can see in the Mercedes system for 113042:
Wiper motor you have:
A 000 542 53 19, replaced by
A 000 542 68 19, optional with
A 000 542 61 19
It is useful to have all these numbers when you are looking for it on, e.g. ebay.
For mixture control for 113042 I have
A 000 542 45 19, replaced by
A 000 542 58 19
For cold start I see
A 001 545 16 24
Here: the system does not recognize PN 033 100 8001. In my car the relays for cold start and for FIP solenoid are the same (280SL), not sure if it applies to your car.
No relays are available at Mercedes.
Voltage regulator
A 002 154 74 06, $400-500 at Mercedes, but here we can find replacements that are less expensive, e.g. Hella - try to search "voltage regulator" on the forum.
