In this issue:

New Cores for Old

In an easy diagnosis, but a complex repair, we follow a heater core and A/C evaporator swap.

Trans R&R

When would you remove and replace a transmission for a spark timing problem? To line up some marker holes. Come and see.

Parts News: Heater Core Pivot Pin

Whether for vehicles long out of production or for modern ones, your best source for Genuine Mercedes-Benz Parts is Mercedes-Benz.

Factory Service Bulletins: Coolant Loss; Shift Softening

These suggestions and solutions for technical problems are from service bulletins and other information published by Mercedes-Benz, selected and adapted for independent repair shops.